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5e6908ea | 1 | /* Output Dwarf2 format symbol table information from GCC. |
69bd9368 | 2 | Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
affad9a4 | 3 | 2003, 2004 Free Software Foundation, Inc. |
e9a25f70 JL |
4 | Contributed by Gary Funck (gary@intrepid.com). |
5 | Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com). | |
469ac993 | 6 | Extensively modified by Jason Merrill (jason@cygnus.com). |
a3f97cbb | 7 | |
1322177d | 8 | This file is part of GCC. |
a3f97cbb | 9 | |
1322177d LB |
10 | GCC is free software; you can redistribute it and/or modify it under |
11 | the terms of the GNU General Public License as published by the Free | |
12 | Software Foundation; either version 2, or (at your option) any later | |
13 | version. | |
a3f97cbb | 14 | |
1322177d LB |
15 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
16 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | for more details. | |
a3f97cbb JW |
19 | |
20 | You should have received a copy of the GNU General Public License | |
1322177d LB |
21 | along with GCC; see the file COPYING. If not, write to the Free |
22 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
23 | 02111-1307, USA. */ | |
a3f97cbb | 24 | |
9eb4015a | 25 | /* TODO: Emit .debug_line header even when there are no functions, since |
348bb3c7 JM |
26 | the file numbers are used by .debug_info. Alternately, leave |
27 | out locations for types and decls. | |
28 | Avoid talking about ctors and op= for PODs. | |
29 | Factor out common prologue sequences into multiple CIEs. */ | |
30 | ||
3f76745e JM |
31 | /* The first part of this file deals with the DWARF 2 frame unwind |
32 | information, which is also used by the GCC efficient exception handling | |
33 | mechanism. The second part, controlled only by an #ifdef | |
34 | DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging | |
35 | information. */ | |
36 | ||
0021b564 | 37 | #include "config.h" |
670ee920 | 38 | #include "system.h" |
4977bab6 ZW |
39 | #include "coretypes.h" |
40 | #include "tm.h" | |
a3f97cbb JW |
41 | #include "tree.h" |
42 | #include "flags.h" | |
11ad4784 | 43 | #include "real.h" |
a3f97cbb JW |
44 | #include "rtl.h" |
45 | #include "hard-reg-set.h" | |
46 | #include "regs.h" | |
47 | #include "insn-config.h" | |
48 | #include "reload.h" | |
52a11cbf | 49 | #include "function.h" |
a3f97cbb | 50 | #include "output.h" |
71dfc51f | 51 | #include "expr.h" |
e78d8e51 | 52 | #include "libfuncs.h" |
3f76745e | 53 | #include "except.h" |
a7cc7f29 | 54 | #include "dwarf2.h" |
76ead72b | 55 | #include "dwarf2out.h" |
2e4b9b8c | 56 | #include "dwarf2asm.h" |
10f0ad3d | 57 | #include "toplev.h" |
1865dbb5 | 58 | #include "varray.h" |
951a525f | 59 | #include "ggc.h" |
881c6935 | 60 | #include "md5.h" |
57bed152 | 61 | #include "tm_p.h" |
2a2b2d43 | 62 | #include "diagnostic.h" |
a51d908e | 63 | #include "debug.h" |
07c9d2eb | 64 | #include "target.h" |
3ac88239 | 65 | #include "langhooks.h" |
cc0017a9 | 66 | #include "hashtab.h" |
1bb17c21 | 67 | #include "cgraph.h" |
6097b0c3 | 68 | #include "input.h" |
a3f97cbb | 69 | |
653e276c | 70 | #ifdef DWARF2_DEBUGGING_INFO |
7080f735 | 71 | static void dwarf2out_source_line (unsigned int, const char *); |
653e276c NB |
72 | #endif |
73 | ||
770ca8c6 JO |
74 | /* DWARF2 Abbreviation Glossary: |
75 | CFA = Canonical Frame Address | |
00a42e21 JM |
76 | a fixed address on the stack which identifies a call frame. |
77 | We define it to be the value of SP just before the call insn. | |
78 | The CFA register and offset, which may change during the course | |
79 | of the function, are used to calculate its value at runtime. | |
a401107d JO |
80 | CFI = Call Frame Instruction |
81 | an instruction for the DWARF2 abstract machine | |
770ca8c6 JO |
82 | CIE = Common Information Entry |
83 | information describing information common to one or more FDEs | |
84 | DIE = Debugging Information Entry | |
85 | FDE = Frame Description Entry | |
86 | information describing the stack call frame, in particular, | |
87 | how to restore registers | |
88 | ||
89 | DW_CFA_... = DWARF2 CFA call frame instruction | |
90 | DW_TAG_... = DWARF2 DIE tag */ | |
91 | ||
0021b564 JM |
92 | /* Decide whether we want to emit frame unwind information for the current |
93 | translation unit. */ | |
94 | ||
95 | int | |
7080f735 | 96 | dwarf2out_do_frame (void) |
0021b564 JM |
97 | { |
98 | return (write_symbols == DWARF2_DEBUG | |
7a0c8d71 | 99 | || write_symbols == VMS_AND_DWARF2_DEBUG |
9ec36da5 | 100 | #ifdef DWARF2_FRAME_INFO |
556273e0 | 101 | || DWARF2_FRAME_INFO |
9ec36da5 | 102 | #endif |
0021b564 | 103 | #ifdef DWARF2_UNWIND_INFO |
14a774a9 | 104 | || flag_unwind_tables |
531073e7 | 105 | || (flag_exceptions && ! USING_SJLJ_EXCEPTIONS) |
0021b564 JM |
106 | #endif |
107 | ); | |
108 | } | |
109 | ||
f3a8e4f5 KG |
110 | /* The size of the target's pointer type. */ |
111 | #ifndef PTR_SIZE | |
112 | #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
113 | #endif | |
114 | ||
9d340419 RO |
115 | /* Various versions of targetm.eh_frame_section. Note these must appear |
116 | outside the DWARF2_DEBUGGING_INFO || DWARF2_UNWIND_INFO macro guards. */ | |
f3a8e4f5 | 117 | |
9d340419 | 118 | /* Version of targetm.eh_frame_section for systems with named sections. */ |
f3a8e4f5 | 119 | void |
9d340419 | 120 | named_section_eh_frame_section (void) |
f3a8e4f5 KG |
121 | { |
122 | #ifdef EH_FRAME_SECTION_NAME | |
96d0f4dc JJ |
123 | #ifdef HAVE_LD_RO_RW_SECTION_MIXING |
124 | int fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0); | |
125 | int per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1); | |
126 | int lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0); | |
127 | int flags; | |
128 | ||
129 | flags = (! flag_pic | |
130 | || ((fde_encoding & 0x70) != DW_EH_PE_absptr | |
131 | && (fde_encoding & 0x70) != DW_EH_PE_aligned | |
132 | && (per_encoding & 0x70) != DW_EH_PE_absptr | |
133 | && (per_encoding & 0x70) != DW_EH_PE_aligned | |
134 | && (lsda_encoding & 0x70) != DW_EH_PE_absptr | |
135 | && (lsda_encoding & 0x70) != DW_EH_PE_aligned)) | |
136 | ? 0 : SECTION_WRITE; | |
137 | named_section_flags (EH_FRAME_SECTION_NAME, flags); | |
138 | #else | |
f3a8e4f5 | 139 | named_section_flags (EH_FRAME_SECTION_NAME, SECTION_WRITE); |
96d0f4dc | 140 | #endif |
9d340419 RO |
141 | #endif |
142 | } | |
143 | ||
144 | /* Version of targetm.eh_frame_section for systems using collect2. */ | |
145 | void | |
146 | collect2_eh_frame_section (void) | |
147 | { | |
f3a8e4f5 KG |
148 | tree label = get_file_function_name ('F'); |
149 | ||
150 | data_section (); | |
151 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE)); | |
5fd9b178 | 152 | targetm.asm_out.globalize_label (asm_out_file, IDENTIFIER_POINTER (label)); |
f3a8e4f5 | 153 | ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label)); |
9d340419 RO |
154 | } |
155 | ||
156 | /* Default version of targetm.eh_frame_section. */ | |
157 | void | |
158 | default_eh_frame_section (void) | |
159 | { | |
160 | #ifdef EH_FRAME_SECTION_NAME | |
161 | named_section_eh_frame_section (); | |
162 | #else | |
163 | collect2_eh_frame_section (); | |
f3a8e4f5 KG |
164 | #endif |
165 | } | |
166 | ||
e2500fed GK |
167 | /* Array of RTXes referenced by the debugging information, which therefore |
168 | must be kept around forever. */ | |
169 | static GTY(()) varray_type used_rtx_varray; | |
170 | ||
171 | /* A pointer to the base of a list of incomplete types which might be | |
172 | completed at some later time. incomplete_types_list needs to be a VARRAY | |
173 | because we want to tell the garbage collector about it. */ | |
174 | static GTY(()) varray_type incomplete_types; | |
175 | ||
176 | /* A pointer to the base of a table of references to declaration | |
177 | scopes. This table is a display which tracks the nesting | |
178 | of declaration scopes at the current scope and containing | |
179 | scopes. This table is used to find the proper place to | |
180 | define type declaration DIE's. */ | |
181 | static GTY(()) varray_type decl_scope_table; | |
182 | ||
eaf95893 RK |
183 | /* How to start an assembler comment. */ |
184 | #ifndef ASM_COMMENT_START | |
185 | #define ASM_COMMENT_START ";#" | |
186 | #endif | |
187 | ||
a3f97cbb JW |
188 | typedef struct dw_cfi_struct *dw_cfi_ref; |
189 | typedef struct dw_fde_struct *dw_fde_ref; | |
190 | typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref; | |
a3f97cbb JW |
191 | |
192 | /* Call frames are described using a sequence of Call Frame | |
193 | Information instructions. The register number, offset | |
194 | and address fields are provided as possible operands; | |
195 | their use is selected by the opcode field. */ | |
71dfc51f | 196 | |
17211ab5 GK |
197 | enum dw_cfi_oprnd_type { |
198 | dw_cfi_oprnd_unused, | |
199 | dw_cfi_oprnd_reg_num, | |
200 | dw_cfi_oprnd_offset, | |
201 | dw_cfi_oprnd_addr, | |
202 | dw_cfi_oprnd_loc | |
203 | }; | |
204 | ||
205 | typedef union dw_cfi_oprnd_struct GTY(()) | |
71dfc51f | 206 | { |
17211ab5 | 207 | unsigned long GTY ((tag ("dw_cfi_oprnd_reg_num"))) dw_cfi_reg_num; |
799f628a | 208 | HOST_WIDE_INT GTY ((tag ("dw_cfi_oprnd_offset"))) dw_cfi_offset; |
17211ab5 GK |
209 | const char * GTY ((tag ("dw_cfi_oprnd_addr"))) dw_cfi_addr; |
210 | struct dw_loc_descr_struct * GTY ((tag ("dw_cfi_oprnd_loc"))) dw_cfi_loc; | |
71dfc51f | 211 | } |
a3f97cbb JW |
212 | dw_cfi_oprnd; |
213 | ||
17211ab5 | 214 | typedef struct dw_cfi_struct GTY(()) |
71dfc51f RK |
215 | { |
216 | dw_cfi_ref dw_cfi_next; | |
217 | enum dwarf_call_frame_info dw_cfi_opc; | |
7080f735 | 218 | dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd1_desc (%1.dw_cfi_opc)"))) |
17211ab5 | 219 | dw_cfi_oprnd1; |
7080f735 | 220 | dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd2_desc (%1.dw_cfi_opc)"))) |
17211ab5 | 221 | dw_cfi_oprnd2; |
71dfc51f | 222 | } |
a3f97cbb JW |
223 | dw_cfi_node; |
224 | ||
7d9d8943 AM |
225 | /* This is how we define the location of the CFA. We use to handle it |
226 | as REG + OFFSET all the time, but now it can be more complex. | |
227 | It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET. | |
556273e0 | 228 | Instead of passing around REG and OFFSET, we pass a copy |
7d9d8943 | 229 | of this structure. */ |
17211ab5 | 230 | typedef struct cfa_loc GTY(()) |
7d9d8943 | 231 | { |
556273e0 | 232 | unsigned long reg; |
799f628a JH |
233 | HOST_WIDE_INT offset; |
234 | HOST_WIDE_INT base_offset; | |
7d9d8943 AM |
235 | int indirect; /* 1 if CFA is accessed via a dereference. */ |
236 | } dw_cfa_location; | |
237 | ||
a3f97cbb | 238 | /* All call frame descriptions (FDE's) in the GCC generated DWARF |
4b674448 | 239 | refer to a single Common Information Entry (CIE), defined at |
fb530c07 | 240 | the beginning of the .debug_frame section. This use of a single |
a3f97cbb JW |
241 | CIE obviates the need to keep track of multiple CIE's |
242 | in the DWARF generation routines below. */ | |
71dfc51f | 243 | |
17211ab5 | 244 | typedef struct dw_fde_struct GTY(()) |
71dfc51f | 245 | { |
4746cf84 | 246 | tree decl; |
d3e3972c KG |
247 | const char *dw_fde_begin; |
248 | const char *dw_fde_current_label; | |
249 | const char *dw_fde_end; | |
71dfc51f | 250 | dw_cfi_ref dw_fde_cfi; |
52a11cbf | 251 | unsigned funcdef_number; |
b6128b8c | 252 | unsigned all_throwers_are_sibcalls : 1; |
52a11cbf RH |
253 | unsigned nothrow : 1; |
254 | unsigned uses_eh_lsda : 1; | |
71dfc51f | 255 | } |
a3f97cbb JW |
256 | dw_fde_node; |
257 | ||
6d2f8887 | 258 | /* Maximum size (in bytes) of an artificially generated label. */ |
a3f97cbb JW |
259 | #define MAX_ARTIFICIAL_LABEL_BYTES 30 |
260 | ||
a1a4189d JB |
261 | /* The size of addresses as they appear in the Dwarf 2 data. |
262 | Some architectures use word addresses to refer to code locations, | |
263 | but Dwarf 2 info always uses byte addresses. On such machines, | |
264 | Dwarf 2 addresses need to be larger than the architecture's | |
265 | pointers. */ | |
266 | #ifndef DWARF2_ADDR_SIZE | |
267 | #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
268 | #endif | |
269 | ||
7e23cb16 | 270 | /* The size in bytes of a DWARF field indicating an offset or length |
a1a4189d JB |
271 | relative to a debug info section, specified to be 4 bytes in the |
272 | DWARF-2 specification. The SGI/MIPS ABI defines it to be the same | |
b13fe8bf | 273 | as PTR_SIZE. */ |
71dfc51f | 274 | |
7e23cb16 JM |
275 | #ifndef DWARF_OFFSET_SIZE |
276 | #define DWARF_OFFSET_SIZE 4 | |
277 | #endif | |
278 | ||
9eb0ef7a KB |
279 | /* According to the (draft) DWARF 3 specification, the initial length |
280 | should either be 4 or 12 bytes. When it's 12 bytes, the first 4 | |
281 | bytes are 0xffffffff, followed by the length stored in the next 8 | |
282 | bytes. | |
283 | ||
284 | However, the SGI/MIPS ABI uses an initial length which is equal to | |
285 | DWARF_OFFSET_SIZE. It is defined (elsewhere) accordingly. */ | |
286 | ||
287 | #ifndef DWARF_INITIAL_LENGTH_SIZE | |
288 | #define DWARF_INITIAL_LENGTH_SIZE (DWARF_OFFSET_SIZE == 4 ? 4 : 12) | |
289 | #endif | |
290 | ||
9a666dda JM |
291 | #define DWARF_VERSION 2 |
292 | ||
7e23cb16 JM |
293 | /* Round SIZE up to the nearest BOUNDARY. */ |
294 | #define DWARF_ROUND(SIZE,BOUNDARY) \ | |
262b6384 | 295 | ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY)) |
a3f97cbb | 296 | |
a3f97cbb | 297 | /* Offsets recorded in opcodes are a multiple of this alignment factor. */ |
27c35f4b | 298 | #ifndef DWARF_CIE_DATA_ALIGNMENT |
469ac993 | 299 | #ifdef STACK_GROWS_DOWNWARD |
08cb3d38 | 300 | #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) |
469ac993 | 301 | #else |
08cb3d38 | 302 | #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) |
469ac993 | 303 | #endif |
2ad9852d | 304 | #endif |
a3f97cbb | 305 | |
3f76745e JM |
306 | /* A pointer to the base of a table that contains frame description |
307 | information for each routine. */ | |
17211ab5 | 308 | static GTY((length ("fde_table_allocated"))) dw_fde_ref fde_table; |
a3f97cbb | 309 | |
3f76745e | 310 | /* Number of elements currently allocated for fde_table. */ |
c2e9147c | 311 | static GTY(()) unsigned fde_table_allocated; |
a94dbf2c | 312 | |
3f76745e | 313 | /* Number of elements in fde_table currently in use. */ |
044b4de3 | 314 | static GTY(()) unsigned fde_table_in_use; |
a3f97cbb | 315 | |
3f76745e JM |
316 | /* Size (in elements) of increments by which we may expand the |
317 | fde_table. */ | |
318 | #define FDE_TABLE_INCREMENT 256 | |
a3f97cbb | 319 | |
a94dbf2c | 320 | /* A list of call frame insns for the CIE. */ |
17211ab5 | 321 | static GTY(()) dw_cfi_ref cie_cfi_head; |
a94dbf2c | 322 | |
c1b50e49 | 323 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
a3f97cbb JW |
324 | /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram |
325 | attribute that accelerates the lookup of the FDE associated | |
556273e0 | 326 | with the subprogram. This variable holds the table index of the FDE |
a3f97cbb JW |
327 | associated with the current function (body) definition. */ |
328 | static unsigned current_funcdef_fde; | |
c1b50e49 | 329 | #endif |
a3f97cbb | 330 | |
17211ab5 | 331 | struct indirect_string_node GTY(()) |
9eb4015a | 332 | { |
17211ab5 | 333 | const char *str; |
9eb4015a JJ |
334 | unsigned int refcount; |
335 | unsigned int form; | |
336 | char *label; | |
337 | }; | |
338 | ||
17211ab5 GK |
339 | static GTY ((param_is (struct indirect_string_node))) htab_t debug_str_hash; |
340 | ||
341 | static GTY(()) int dw2_string_counter; | |
044b4de3 | 342 | static GTY(()) unsigned long dwarf2out_cfi_label_num; |
17211ab5 GK |
343 | |
344 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
345 | ||
a3f97cbb | 346 | /* Forward declarations for functions defined in this file. */ |
71dfc51f | 347 | |
7080f735 AJ |
348 | static char *stripattributes (const char *); |
349 | static const char *dwarf_cfi_name (unsigned); | |
350 | static dw_cfi_ref new_cfi (void); | |
351 | static void add_cfi (dw_cfi_ref *, dw_cfi_ref); | |
352 | static void add_fde_cfi (const char *, dw_cfi_ref); | |
353 | static void lookup_cfa_1 (dw_cfi_ref, dw_cfa_location *); | |
354 | static void lookup_cfa (dw_cfa_location *); | |
799f628a | 355 | static void reg_save (const char *, unsigned, unsigned, HOST_WIDE_INT); |
7080f735 | 356 | static void initial_return_save (rtx); |
799f628a | 357 | static HOST_WIDE_INT stack_adjust_offset (rtx); |
7080f735 AJ |
358 | static void output_cfi (dw_cfi_ref, dw_fde_ref, int); |
359 | static void output_call_frame_info (int); | |
360 | static void dwarf2out_stack_adjust (rtx); | |
799f628a | 361 | static void queue_reg_save (const char *, rtx, HOST_WIDE_INT); |
7080f735 AJ |
362 | static void flush_queued_reg_saves (void); |
363 | static bool clobbers_queued_reg_save (rtx); | |
364 | static void dwarf2out_frame_debug_expr (rtx, const char *); | |
a3f97cbb | 365 | |
7d9d8943 | 366 | /* Support for complex CFA locations. */ |
7080f735 AJ |
367 | static void output_cfa_loc (dw_cfi_ref); |
368 | static void get_cfa_from_loc_descr (dw_cfa_location *, | |
369 | struct dw_loc_descr_struct *); | |
7d9d8943 | 370 | static struct dw_loc_descr_struct *build_cfa_loc |
7080f735 AJ |
371 | (dw_cfa_location *); |
372 | static void def_cfa_1 (const char *, dw_cfa_location *); | |
7d9d8943 | 373 | |
2e4b9b8c RH |
374 | /* How to start an assembler comment. */ |
375 | #ifndef ASM_COMMENT_START | |
376 | #define ASM_COMMENT_START ";#" | |
a3f97cbb JW |
377 | #endif |
378 | ||
7e23cb16 JM |
379 | /* Data and reference forms for relocatable data. */ |
380 | #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4) | |
381 | #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4) | |
382 | ||
cf2fe500 RH |
383 | #ifndef DEBUG_FRAME_SECTION |
384 | #define DEBUG_FRAME_SECTION ".debug_frame" | |
a3f97cbb | 385 | #endif |
a3f97cbb | 386 | |
5c90448c JM |
387 | #ifndef FUNC_BEGIN_LABEL |
388 | #define FUNC_BEGIN_LABEL "LFB" | |
a3f97cbb | 389 | #endif |
2ad9852d | 390 | |
5c90448c JM |
391 | #ifndef FUNC_END_LABEL |
392 | #define FUNC_END_LABEL "LFE" | |
a3f97cbb | 393 | #endif |
2ad9852d | 394 | |
4746cf84 | 395 | #ifndef FRAME_BEGIN_LABEL |
27d95cbe | 396 | #define FRAME_BEGIN_LABEL "Lframe" |
4746cf84 | 397 | #endif |
a6ab3aad JM |
398 | #define CIE_AFTER_SIZE_LABEL "LSCIE" |
399 | #define CIE_END_LABEL "LECIE" | |
2e4b9b8c RH |
400 | #define FDE_LABEL "LSFDE" |
401 | #define FDE_AFTER_SIZE_LABEL "LASFDE" | |
a6ab3aad | 402 | #define FDE_END_LABEL "LEFDE" |
981975b6 RH |
403 | #define LINE_NUMBER_BEGIN_LABEL "LSLT" |
404 | #define LINE_NUMBER_END_LABEL "LELT" | |
405 | #define LN_PROLOG_AS_LABEL "LASLTP" | |
406 | #define LN_PROLOG_END_LABEL "LELTP" | |
881c6935 | 407 | #define DIE_LABEL_PREFIX "DW" |
a3f97cbb | 408 | |
c8cc5c4a | 409 | /* The DWARF 2 CFA column which tracks the return address. Normally this |
a94dbf2c JM |
410 | is the column for PC, or the first column after all of the hard |
411 | registers. */ | |
c8cc5c4a | 412 | #ifndef DWARF_FRAME_RETURN_COLUMN |
a94dbf2c | 413 | #ifdef PC_REGNUM |
7080f735 | 414 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) |
a94dbf2c | 415 | #else |
7080f735 | 416 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS |
a94dbf2c | 417 | #endif |
c8cc5c4a JM |
418 | #endif |
419 | ||
420 | /* The mapping from gcc register number to DWARF 2 CFA column number. By | |
469ac993 | 421 | default, we just provide columns for all registers. */ |
c8cc5c4a | 422 | #ifndef DWARF_FRAME_REGNUM |
469ac993 | 423 | #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) |
c8cc5c4a | 424 | #endif |
3f76745e | 425 | |
2ad9852d RK |
426 | /* The offset from the incoming value of %sp to the top of the stack frame |
427 | for the current function. */ | |
428 | #ifndef INCOMING_FRAME_SP_OFFSET | |
429 | #define INCOMING_FRAME_SP_OFFSET 0 | |
430 | #endif | |
431 | \f | |
0021b564 JM |
432 | /* Hook used by __throw. */ |
433 | ||
434 | rtx | |
7080f735 | 435 | expand_builtin_dwarf_sp_column (void) |
0021b564 | 436 | { |
9c80ff25 | 437 | return GEN_INT (DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM)); |
0021b564 JM |
438 | } |
439 | ||
71dfc51f | 440 | /* Return a pointer to a copy of the section string name S with all |
bf20f341 | 441 | attributes stripped off, and an asterisk prepended (for assemble_name). */ |
71dfc51f RK |
442 | |
443 | static inline char * | |
7080f735 | 444 | stripattributes (const char *s) |
a3f97cbb | 445 | { |
bf20f341 | 446 | char *stripped = xmalloc (strlen (s) + 2); |
71dfc51f RK |
447 | char *p = stripped; |
448 | ||
bf20f341 JW |
449 | *p++ = '*'; |
450 | ||
451 | while (*s && *s != ',') | |
452 | *p++ = *s++; | |
71dfc51f | 453 | |
a3f97cbb JW |
454 | *p = '\0'; |
455 | return stripped; | |
456 | } | |
457 | ||
d9d5c9de | 458 | /* Generate code to initialize the register size table. */ |
2f3ca9e7 | 459 | |
d9d5c9de | 460 | void |
7080f735 | 461 | expand_builtin_init_dwarf_reg_sizes (tree address) |
2f3ca9e7 | 462 | { |
d9d5c9de BS |
463 | int i; |
464 | enum machine_mode mode = TYPE_MODE (char_type_node); | |
465 | rtx addr = expand_expr (address, NULL_RTX, VOIDmode, 0); | |
2ad9852d | 466 | rtx mem = gen_rtx_MEM (BLKmode, addr); |
71628aa0 | 467 | bool wrote_return_column = false; |
2f3ca9e7 | 468 | |
91ea38f9 JH |
469 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
470 | if (DWARF_FRAME_REGNUM (i) < DWARF_FRAME_REGISTERS) | |
471 | { | |
472 | HOST_WIDE_INT offset = DWARF_FRAME_REGNUM (i) * GET_MODE_SIZE (mode); | |
fee226d2 R |
473 | enum machine_mode save_mode = reg_raw_mode[i]; |
474 | HOST_WIDE_INT size; | |
2f3ca9e7 | 475 | |
fee226d2 R |
476 | if (HARD_REGNO_CALL_PART_CLOBBERED (i, save_mode)) |
477 | save_mode = choose_hard_reg_mode (i, 1, true); | |
71628aa0 R |
478 | if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN) |
479 | { | |
480 | if (save_mode == VOIDmode) | |
481 | continue; | |
482 | wrote_return_column = true; | |
483 | } | |
fee226d2 | 484 | size = GET_MODE_SIZE (save_mode); |
91ea38f9 JH |
485 | if (offset < 0) |
486 | continue; | |
c699cee9 | 487 | |
91ea38f9 JH |
488 | emit_move_insn (adjust_address (mem, mode, offset), GEN_INT (size)); |
489 | } | |
ed80cd68 RH |
490 | |
491 | #ifdef DWARF_ALT_FRAME_RETURN_COLUMN | |
492 | if (! wrote_return_column) | |
493 | abort (); | |
494 | i = DWARF_ALT_FRAME_RETURN_COLUMN; | |
495 | wrote_return_column = false; | |
496 | #else | |
497 | i = DWARF_FRAME_RETURN_COLUMN; | |
498 | #endif | |
499 | ||
71628aa0 R |
500 | if (! wrote_return_column) |
501 | { | |
502 | enum machine_mode save_mode = Pmode; | |
ed80cd68 | 503 | HOST_WIDE_INT offset = i * GET_MODE_SIZE (mode); |
71628aa0 R |
504 | HOST_WIDE_INT size = GET_MODE_SIZE (save_mode); |
505 | emit_move_insn (adjust_address (mem, mode, offset), GEN_INT (size)); | |
506 | } | |
2f3ca9e7 JM |
507 | } |
508 | ||
3f76745e | 509 | /* Convert a DWARF call frame info. operation to its string name */ |
a3f97cbb | 510 | |
d560ee52 | 511 | static const char * |
7080f735 | 512 | dwarf_cfi_name (unsigned int cfi_opc) |
3f76745e JM |
513 | { |
514 | switch (cfi_opc) | |
515 | { | |
516 | case DW_CFA_advance_loc: | |
517 | return "DW_CFA_advance_loc"; | |
518 | case DW_CFA_offset: | |
519 | return "DW_CFA_offset"; | |
520 | case DW_CFA_restore: | |
521 | return "DW_CFA_restore"; | |
522 | case DW_CFA_nop: | |
523 | return "DW_CFA_nop"; | |
524 | case DW_CFA_set_loc: | |
525 | return "DW_CFA_set_loc"; | |
526 | case DW_CFA_advance_loc1: | |
527 | return "DW_CFA_advance_loc1"; | |
528 | case DW_CFA_advance_loc2: | |
529 | return "DW_CFA_advance_loc2"; | |
530 | case DW_CFA_advance_loc4: | |
531 | return "DW_CFA_advance_loc4"; | |
532 | case DW_CFA_offset_extended: | |
533 | return "DW_CFA_offset_extended"; | |
534 | case DW_CFA_restore_extended: | |
535 | return "DW_CFA_restore_extended"; | |
536 | case DW_CFA_undefined: | |
537 | return "DW_CFA_undefined"; | |
538 | case DW_CFA_same_value: | |
539 | return "DW_CFA_same_value"; | |
540 | case DW_CFA_register: | |
541 | return "DW_CFA_register"; | |
542 | case DW_CFA_remember_state: | |
543 | return "DW_CFA_remember_state"; | |
544 | case DW_CFA_restore_state: | |
545 | return "DW_CFA_restore_state"; | |
546 | case DW_CFA_def_cfa: | |
547 | return "DW_CFA_def_cfa"; | |
548 | case DW_CFA_def_cfa_register: | |
549 | return "DW_CFA_def_cfa_register"; | |
550 | case DW_CFA_def_cfa_offset: | |
551 | return "DW_CFA_def_cfa_offset"; | |
6bb28965 JM |
552 | |
553 | /* DWARF 3 */ | |
7d9d8943 AM |
554 | case DW_CFA_def_cfa_expression: |
555 | return "DW_CFA_def_cfa_expression"; | |
6bb28965 JM |
556 | case DW_CFA_expression: |
557 | return "DW_CFA_expression"; | |
558 | case DW_CFA_offset_extended_sf: | |
559 | return "DW_CFA_offset_extended_sf"; | |
560 | case DW_CFA_def_cfa_sf: | |
561 | return "DW_CFA_def_cfa_sf"; | |
562 | case DW_CFA_def_cfa_offset_sf: | |
563 | return "DW_CFA_def_cfa_offset_sf"; | |
c53aa195 | 564 | |
3f76745e JM |
565 | /* SGI/MIPS specific */ |
566 | case DW_CFA_MIPS_advance_loc8: | |
567 | return "DW_CFA_MIPS_advance_loc8"; | |
c53aa195 JM |
568 | |
569 | /* GNU extensions */ | |
570 | case DW_CFA_GNU_window_save: | |
571 | return "DW_CFA_GNU_window_save"; | |
0021b564 JM |
572 | case DW_CFA_GNU_args_size: |
573 | return "DW_CFA_GNU_args_size"; | |
3f388b42 GK |
574 | case DW_CFA_GNU_negative_offset_extended: |
575 | return "DW_CFA_GNU_negative_offset_extended"; | |
c53aa195 | 576 | |
3f76745e JM |
577 | default: |
578 | return "DW_CFA_<unknown>"; | |
579 | } | |
580 | } | |
a3f97cbb | 581 | |
3f76745e | 582 | /* Return a pointer to a newly allocated Call Frame Instruction. */ |
71dfc51f | 583 | |
3f76745e | 584 | static inline dw_cfi_ref |
7080f735 | 585 | new_cfi (void) |
3f76745e | 586 | { |
703ad42b | 587 | dw_cfi_ref cfi = ggc_alloc (sizeof (dw_cfi_node)); |
71dfc51f | 588 | |
3f76745e JM |
589 | cfi->dw_cfi_next = NULL; |
590 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0; | |
591 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0; | |
a3f97cbb | 592 | |
3f76745e JM |
593 | return cfi; |
594 | } | |
a3f97cbb | 595 | |
3f76745e | 596 | /* Add a Call Frame Instruction to list of instructions. */ |
a3f97cbb | 597 | |
3f76745e | 598 | static inline void |
7080f735 | 599 | add_cfi (dw_cfi_ref *list_head, dw_cfi_ref cfi) |
3f76745e | 600 | { |
b3694847 | 601 | dw_cfi_ref *p; |
a3f97cbb | 602 | |
3f76745e JM |
603 | /* Find the end of the chain. */ |
604 | for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next) | |
605 | ; | |
606 | ||
607 | *p = cfi; | |
a3f97cbb JW |
608 | } |
609 | ||
3f76745e | 610 | /* Generate a new label for the CFI info to refer to. */ |
71dfc51f | 611 | |
c53aa195 | 612 | char * |
7080f735 | 613 | dwarf2out_cfi_label (void) |
a3f97cbb | 614 | { |
3f76745e | 615 | static char label[20]; |
556273e0 | 616 | |
044b4de3 | 617 | ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", dwarf2out_cfi_label_num++); |
3f76745e | 618 | ASM_OUTPUT_LABEL (asm_out_file, label); |
3f76745e | 619 | return label; |
a3f97cbb JW |
620 | } |
621 | ||
3f76745e JM |
622 | /* Add CFI to the current fde at the PC value indicated by LABEL if specified, |
623 | or to the CIE if LABEL is NULL. */ | |
71dfc51f | 624 | |
3f76745e | 625 | static void |
7080f735 | 626 | add_fde_cfi (const char *label, dw_cfi_ref cfi) |
a3f97cbb | 627 | { |
3f76745e JM |
628 | if (label) |
629 | { | |
b3694847 | 630 | dw_fde_ref fde = &fde_table[fde_table_in_use - 1]; |
a3f97cbb | 631 | |
3f76745e JM |
632 | if (*label == 0) |
633 | label = dwarf2out_cfi_label (); | |
71dfc51f | 634 | |
3f76745e JM |
635 | if (fde->dw_fde_current_label == NULL |
636 | || strcmp (label, fde->dw_fde_current_label) != 0) | |
637 | { | |
b3694847 | 638 | dw_cfi_ref xcfi; |
a3f97cbb | 639 | |
3f76745e | 640 | fde->dw_fde_current_label = label = xstrdup (label); |
71dfc51f | 641 | |
3f76745e JM |
642 | /* Set the location counter to the new label. */ |
643 | xcfi = new_cfi (); | |
644 | xcfi->dw_cfi_opc = DW_CFA_advance_loc4; | |
645 | xcfi->dw_cfi_oprnd1.dw_cfi_addr = label; | |
646 | add_cfi (&fde->dw_fde_cfi, xcfi); | |
647 | } | |
71dfc51f | 648 | |
3f76745e JM |
649 | add_cfi (&fde->dw_fde_cfi, cfi); |
650 | } | |
651 | ||
652 | else | |
653 | add_cfi (&cie_cfi_head, cfi); | |
a3f97cbb JW |
654 | } |
655 | ||
3f76745e | 656 | /* Subroutine of lookup_cfa. */ |
71dfc51f | 657 | |
3f76745e | 658 | static inline void |
7080f735 | 659 | lookup_cfa_1 (dw_cfi_ref cfi, dw_cfa_location *loc) |
a3f97cbb | 660 | { |
3f76745e JM |
661 | switch (cfi->dw_cfi_opc) |
662 | { | |
663 | case DW_CFA_def_cfa_offset: | |
7d9d8943 | 664 | loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset; |
3f76745e JM |
665 | break; |
666 | case DW_CFA_def_cfa_register: | |
7d9d8943 | 667 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
3f76745e JM |
668 | break; |
669 | case DW_CFA_def_cfa: | |
7d9d8943 AM |
670 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
671 | loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset; | |
672 | break; | |
673 | case DW_CFA_def_cfa_expression: | |
674 | get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc); | |
3f76745e | 675 | break; |
e9a25f70 JL |
676 | default: |
677 | break; | |
3f76745e | 678 | } |
a3f97cbb JW |
679 | } |
680 | ||
3f76745e | 681 | /* Find the previous value for the CFA. */ |
71dfc51f | 682 | |
3f76745e | 683 | static void |
7080f735 | 684 | lookup_cfa (dw_cfa_location *loc) |
a3f97cbb | 685 | { |
b3694847 | 686 | dw_cfi_ref cfi; |
3f76745e | 687 | |
7d9d8943 AM |
688 | loc->reg = (unsigned long) -1; |
689 | loc->offset = 0; | |
690 | loc->indirect = 0; | |
691 | loc->base_offset = 0; | |
3f76745e JM |
692 | |
693 | for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next) | |
7d9d8943 | 694 | lookup_cfa_1 (cfi, loc); |
3f76745e JM |
695 | |
696 | if (fde_table_in_use) | |
a3f97cbb | 697 | { |
b3694847 | 698 | dw_fde_ref fde = &fde_table[fde_table_in_use - 1]; |
3f76745e | 699 | for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next) |
7d9d8943 | 700 | lookup_cfa_1 (cfi, loc); |
a3f97cbb JW |
701 | } |
702 | } | |
703 | ||
3f76745e | 704 | /* The current rule for calculating the DWARF2 canonical frame address. */ |
fbfa55b0 | 705 | static dw_cfa_location cfa; |
71dfc51f | 706 | |
3f76745e JM |
707 | /* The register used for saving registers to the stack, and its offset |
708 | from the CFA. */ | |
fbfa55b0 | 709 | static dw_cfa_location cfa_store; |
3f76745e | 710 | |
0021b564 | 711 | /* The running total of the size of arguments pushed onto the stack. */ |
799f628a | 712 | static HOST_WIDE_INT args_size; |
0021b564 | 713 | |
b57d9225 | 714 | /* The last args_size we actually output. */ |
799f628a | 715 | static HOST_WIDE_INT old_args_size; |
b57d9225 | 716 | |
3f76745e JM |
717 | /* Entry point to update the canonical frame address (CFA). |
718 | LABEL is passed to add_fde_cfi. The value of CFA is now to be | |
719 | calculated from REG+OFFSET. */ | |
720 | ||
721 | void | |
799f628a | 722 | dwarf2out_def_cfa (const char *label, unsigned int reg, HOST_WIDE_INT offset) |
7d9d8943 AM |
723 | { |
724 | dw_cfa_location loc; | |
725 | loc.indirect = 0; | |
726 | loc.base_offset = 0; | |
727 | loc.reg = reg; | |
728 | loc.offset = offset; | |
729 | def_cfa_1 (label, &loc); | |
730 | } | |
731 | ||
770ca8c6 | 732 | /* This routine does the actual work. The CFA is now calculated from |
7d9d8943 | 733 | the dw_cfa_location structure. */ |
2ad9852d | 734 | |
7d9d8943 | 735 | static void |
7080f735 | 736 | def_cfa_1 (const char *label, dw_cfa_location *loc_p) |
a3f97cbb | 737 | { |
b3694847 | 738 | dw_cfi_ref cfi; |
7d9d8943 | 739 | dw_cfa_location old_cfa, loc; |
3f76745e | 740 | |
7d9d8943 AM |
741 | cfa = *loc_p; |
742 | loc = *loc_p; | |
5bef9b1f | 743 | |
7d9d8943 AM |
744 | if (cfa_store.reg == loc.reg && loc.indirect == 0) |
745 | cfa_store.offset = loc.offset; | |
3f76745e | 746 | |
7d9d8943 AM |
747 | loc.reg = DWARF_FRAME_REGNUM (loc.reg); |
748 | lookup_cfa (&old_cfa); | |
749 | ||
2ad9852d RK |
750 | /* If nothing changed, no need to issue any call frame instructions. */ |
751 | if (loc.reg == old_cfa.reg && loc.offset == old_cfa.offset | |
752 | && loc.indirect == old_cfa.indirect | |
753 | && (loc.indirect == 0 || loc.base_offset == old_cfa.base_offset)) | |
754 | return; | |
3f76745e JM |
755 | |
756 | cfi = new_cfi (); | |
757 | ||
e09bbb25 | 758 | if (loc.reg == old_cfa.reg && !loc.indirect) |
a3f97cbb | 759 | { |
770ca8c6 JO |
760 | /* Construct a "DW_CFA_def_cfa_offset <offset>" instruction, |
761 | indicating the CFA register did not change but the offset | |
762 | did. */ | |
3f76745e | 763 | cfi->dw_cfi_opc = DW_CFA_def_cfa_offset; |
7d9d8943 | 764 | cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset; |
3f76745e | 765 | } |
a3f97cbb | 766 | |
3f76745e | 767 | #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */ |
7d9d8943 | 768 | else if (loc.offset == old_cfa.offset && old_cfa.reg != (unsigned long) -1 |
e09bbb25 | 769 | && !loc.indirect) |
3f76745e | 770 | { |
770ca8c6 JO |
771 | /* Construct a "DW_CFA_def_cfa_register <register>" instruction, |
772 | indicating the CFA register has changed to <register> but the | |
773 | offset has not changed. */ | |
3f76745e | 774 | cfi->dw_cfi_opc = DW_CFA_def_cfa_register; |
7d9d8943 | 775 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; |
3f76745e JM |
776 | } |
777 | #endif | |
a3f97cbb | 778 | |
7d9d8943 | 779 | else if (loc.indirect == 0) |
3f76745e | 780 | { |
770ca8c6 JO |
781 | /* Construct a "DW_CFA_def_cfa <register> <offset>" instruction, |
782 | indicating the CFA register has changed to <register> with | |
783 | the specified offset. */ | |
3f76745e | 784 | cfi->dw_cfi_opc = DW_CFA_def_cfa; |
7d9d8943 AM |
785 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; |
786 | cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset; | |
787 | } | |
788 | else | |
789 | { | |
770ca8c6 JO |
790 | /* Construct a DW_CFA_def_cfa_expression instruction to |
791 | calculate the CFA using a full location expression since no | |
792 | register-offset pair is available. */ | |
556273e0 | 793 | struct dw_loc_descr_struct *loc_list; |
2ad9852d | 794 | |
7d9d8943 AM |
795 | cfi->dw_cfi_opc = DW_CFA_def_cfa_expression; |
796 | loc_list = build_cfa_loc (&loc); | |
797 | cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list; | |
a3f97cbb | 798 | } |
3f76745e JM |
799 | |
800 | add_fde_cfi (label, cfi); | |
a3f97cbb JW |
801 | } |
802 | ||
3f76745e JM |
803 | /* Add the CFI for saving a register. REG is the CFA column number. |
804 | LABEL is passed to add_fde_cfi. | |
805 | If SREG is -1, the register is saved at OFFSET from the CFA; | |
806 | otherwise it is saved in SREG. */ | |
71dfc51f | 807 | |
3f76745e | 808 | static void |
799f628a | 809 | reg_save (const char *label, unsigned int reg, unsigned int sreg, HOST_WIDE_INT offset) |
a3f97cbb | 810 | { |
b3694847 | 811 | dw_cfi_ref cfi = new_cfi (); |
3f76745e JM |
812 | |
813 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg; | |
814 | ||
85066503 MH |
815 | /* The following comparison is correct. -1 is used to indicate that |
816 | the value isn't a register number. */ | |
817 | if (sreg == (unsigned int) -1) | |
a3f97cbb | 818 | { |
3f76745e JM |
819 | if (reg & ~0x3f) |
820 | /* The register number won't fit in 6 bits, so we have to use | |
821 | the long form. */ | |
822 | cfi->dw_cfi_opc = DW_CFA_offset_extended; | |
823 | else | |
824 | cfi->dw_cfi_opc = DW_CFA_offset; | |
825 | ||
27c35f4b HPN |
826 | #ifdef ENABLE_CHECKING |
827 | { | |
828 | /* If we get an offset that is not a multiple of | |
829 | DWARF_CIE_DATA_ALIGNMENT, there is either a bug in the | |
830 | definition of DWARF_CIE_DATA_ALIGNMENT, or a bug in the machine | |
831 | description. */ | |
799f628a | 832 | HOST_WIDE_INT check_offset = offset / DWARF_CIE_DATA_ALIGNMENT; |
27c35f4b HPN |
833 | |
834 | if (check_offset * DWARF_CIE_DATA_ALIGNMENT != offset) | |
835 | abort (); | |
836 | } | |
837 | #endif | |
3f76745e | 838 | offset /= DWARF_CIE_DATA_ALIGNMENT; |
3a88cbd1 | 839 | if (offset < 0) |
6bb28965 | 840 | cfi->dw_cfi_opc = DW_CFA_offset_extended_sf; |
2ad9852d | 841 | |
3f76745e JM |
842 | cfi->dw_cfi_oprnd2.dw_cfi_offset = offset; |
843 | } | |
2c849145 JM |
844 | else if (sreg == reg) |
845 | /* We could emit a DW_CFA_same_value in this case, but don't bother. */ | |
846 | return; | |
3f76745e JM |
847 | else |
848 | { | |
849 | cfi->dw_cfi_opc = DW_CFA_register; | |
850 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg; | |
851 | } | |
852 | ||
853 | add_fde_cfi (label, cfi); | |
854 | } | |
855 | ||
c53aa195 JM |
856 | /* Add the CFI for saving a register window. LABEL is passed to reg_save. |
857 | This CFI tells the unwinder that it needs to restore the window registers | |
858 | from the previous frame's window save area. | |
556273e0 | 859 | |
c53aa195 JM |
860 | ??? Perhaps we should note in the CIE where windows are saved (instead of |
861 | assuming 0(cfa)) and what registers are in the window. */ | |
862 | ||
863 | void | |
7080f735 | 864 | dwarf2out_window_save (const char *label) |
c53aa195 | 865 | { |
b3694847 | 866 | dw_cfi_ref cfi = new_cfi (); |
2ad9852d | 867 | |
c53aa195 JM |
868 | cfi->dw_cfi_opc = DW_CFA_GNU_window_save; |
869 | add_fde_cfi (label, cfi); | |
870 | } | |
871 | ||
0021b564 JM |
872 | /* Add a CFI to update the running total of the size of arguments |
873 | pushed onto the stack. */ | |
874 | ||
875 | void | |
799f628a | 876 | dwarf2out_args_size (const char *label, HOST_WIDE_INT size) |
0021b564 | 877 | { |
b3694847 | 878 | dw_cfi_ref cfi; |
b57d9225 JM |
879 | |
880 | if (size == old_args_size) | |
881 | return; | |
2ad9852d | 882 | |
b57d9225 JM |
883 | old_args_size = size; |
884 | ||
885 | cfi = new_cfi (); | |
0021b564 JM |
886 | cfi->dw_cfi_opc = DW_CFA_GNU_args_size; |
887 | cfi->dw_cfi_oprnd1.dw_cfi_offset = size; | |
888 | add_fde_cfi (label, cfi); | |
889 | } | |
890 | ||
c53aa195 JM |
891 | /* Entry point for saving a register to the stack. REG is the GCC register |
892 | number. LABEL and OFFSET are passed to reg_save. */ | |
3f76745e JM |
893 | |
894 | void | |
799f628a | 895 | dwarf2out_reg_save (const char *label, unsigned int reg, HOST_WIDE_INT offset) |
3f76745e JM |
896 | { |
897 | reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset); | |
898 | } | |
899 | ||
c53aa195 JM |
900 | /* Entry point for saving the return address in the stack. |
901 | LABEL and OFFSET are passed to reg_save. */ | |
902 | ||
903 | void | |
799f628a | 904 | dwarf2out_return_save (const char *label, HOST_WIDE_INT offset) |
c53aa195 JM |
905 | { |
906 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset); | |
907 | } | |
908 | ||
909 | /* Entry point for saving the return address in a register. | |
910 | LABEL and SREG are passed to reg_save. */ | |
911 | ||
912 | void | |
7080f735 | 913 | dwarf2out_return_reg (const char *label, unsigned int sreg) |
c53aa195 JM |
914 | { |
915 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0); | |
916 | } | |
917 | ||
3f76745e JM |
918 | /* Record the initial position of the return address. RTL is |
919 | INCOMING_RETURN_ADDR_RTX. */ | |
920 | ||
921 | static void | |
7080f735 | 922 | initial_return_save (rtx rtl) |
3f76745e | 923 | { |
973838fd | 924 | unsigned int reg = (unsigned int) -1; |
2ad9852d | 925 | HOST_WIDE_INT offset = 0; |
3f76745e JM |
926 | |
927 | switch (GET_CODE (rtl)) | |
928 | { | |
929 | case REG: | |
930 | /* RA is in a register. */ | |
2c849145 | 931 | reg = DWARF_FRAME_REGNUM (REGNO (rtl)); |
3f76745e | 932 | break; |
2ad9852d | 933 | |
3f76745e JM |
934 | case MEM: |
935 | /* RA is on the stack. */ | |
936 | rtl = XEXP (rtl, 0); | |
937 | switch (GET_CODE (rtl)) | |
938 | { | |
939 | case REG: | |
3a88cbd1 JL |
940 | if (REGNO (rtl) != STACK_POINTER_REGNUM) |
941 | abort (); | |
3f76745e JM |
942 | offset = 0; |
943 | break; | |
2ad9852d | 944 | |
3f76745e | 945 | case PLUS: |
3a88cbd1 JL |
946 | if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM) |
947 | abort (); | |
3f76745e JM |
948 | offset = INTVAL (XEXP (rtl, 1)); |
949 | break; | |
2ad9852d | 950 | |
3f76745e | 951 | case MINUS: |
3a88cbd1 JL |
952 | if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM) |
953 | abort (); | |
3f76745e JM |
954 | offset = -INTVAL (XEXP (rtl, 1)); |
955 | break; | |
2ad9852d | 956 | |
3f76745e JM |
957 | default: |
958 | abort (); | |
959 | } | |
2ad9852d | 960 | |
3f76745e | 961 | break; |
2ad9852d | 962 | |
c53aa195 JM |
963 | case PLUS: |
964 | /* The return address is at some offset from any value we can | |
965 | actually load. For instance, on the SPARC it is in %i7+8. Just | |
966 | ignore the offset for now; it doesn't matter for unwinding frames. */ | |
3a88cbd1 JL |
967 | if (GET_CODE (XEXP (rtl, 1)) != CONST_INT) |
968 | abort (); | |
c53aa195 JM |
969 | initial_return_save (XEXP (rtl, 0)); |
970 | return; | |
2ad9852d | 971 | |
a3f97cbb | 972 | default: |
3f76745e | 973 | abort (); |
a3f97cbb | 974 | } |
3f76745e | 975 | |
7d9d8943 | 976 | reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset); |
a3f97cbb JW |
977 | } |
978 | ||
1ba5ae8f | 979 | /* Given a SET, calculate the amount of stack adjustment it |
30f7a378 | 980 | contains. */ |
1ba5ae8f | 981 | |
799f628a | 982 | static HOST_WIDE_INT |
7080f735 | 983 | stack_adjust_offset (rtx pattern) |
1ba5ae8f AH |
984 | { |
985 | rtx src = SET_SRC (pattern); | |
986 | rtx dest = SET_DEST (pattern); | |
2ad9852d | 987 | HOST_WIDE_INT offset = 0; |
1ba5ae8f AH |
988 | enum rtx_code code; |
989 | ||
990 | if (dest == stack_pointer_rtx) | |
991 | { | |
992 | /* (set (reg sp) (plus (reg sp) (const_int))) */ | |
993 | code = GET_CODE (src); | |
994 | if (! (code == PLUS || code == MINUS) | |
995 | || XEXP (src, 0) != stack_pointer_rtx | |
996 | || GET_CODE (XEXP (src, 1)) != CONST_INT) | |
997 | return 0; | |
998 | ||
999 | offset = INTVAL (XEXP (src, 1)); | |
f472fa29 AM |
1000 | if (code == PLUS) |
1001 | offset = -offset; | |
1ba5ae8f AH |
1002 | } |
1003 | else if (GET_CODE (dest) == MEM) | |
1004 | { | |
1005 | /* (set (mem (pre_dec (reg sp))) (foo)) */ | |
1006 | src = XEXP (dest, 0); | |
1007 | code = GET_CODE (src); | |
1008 | ||
c26fbbca KH |
1009 | switch (code) |
1010 | { | |
f472fa29 AM |
1011 | case PRE_MODIFY: |
1012 | case POST_MODIFY: | |
1013 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1014 | { | |
1015 | rtx val = XEXP (XEXP (src, 1), 1); | |
1016 | /* We handle only adjustments by constant amount. */ | |
1017 | if (GET_CODE (XEXP (src, 1)) != PLUS || | |
1018 | GET_CODE (val) != CONST_INT) | |
c26fbbca | 1019 | abort (); |
f472fa29 AM |
1020 | offset = -INTVAL (val); |
1021 | break; | |
1022 | } | |
1023 | return 0; | |
1024 | ||
1025 | case PRE_DEC: | |
1026 | case POST_DEC: | |
1027 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1028 | { | |
1029 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1030 | break; | |
1031 | } | |
1032 | return 0; | |
1033 | ||
1034 | case PRE_INC: | |
1035 | case POST_INC: | |
1036 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1037 | { | |
1038 | offset = -GET_MODE_SIZE (GET_MODE (dest)); | |
1039 | break; | |
1040 | } | |
1041 | return 0; | |
2ad9852d | 1042 | |
f472fa29 AM |
1043 | default: |
1044 | return 0; | |
e2134eea | 1045 | } |
1ba5ae8f AH |
1046 | } |
1047 | else | |
1048 | return 0; | |
1049 | ||
1ba5ae8f AH |
1050 | return offset; |
1051 | } | |
1052 | ||
0021b564 JM |
1053 | /* Check INSN to see if it looks like a push or a stack adjustment, and |
1054 | make a note of it if it does. EH uses this information to find out how | |
1055 | much extra space it needs to pop off the stack. */ | |
1056 | ||
1057 | static void | |
7080f735 | 1058 | dwarf2out_stack_adjust (rtx insn) |
0021b564 | 1059 | { |
2ad9852d | 1060 | HOST_WIDE_INT offset; |
d3e3972c | 1061 | const char *label; |
2ad9852d | 1062 | int i; |
0021b564 | 1063 | |
b298f00f RH |
1064 | /* Don't handle epilogues at all. Certainly it would be wrong to do so |
1065 | with this function. Proper support would require all frame-related | |
1066 | insns to be marked, and to be able to handle saving state around | |
1067 | epilogues textually in the middle of the function. */ | |
1068 | if (prologue_epilogue_contains (insn) || sibcall_epilogue_contains (insn)) | |
1069 | return; | |
1070 | ||
2ad9852d | 1071 | if (!flag_asynchronous_unwind_tables && GET_CODE (insn) == CALL_INSN) |
b57d9225 JM |
1072 | { |
1073 | /* Extract the size of the args from the CALL rtx itself. */ | |
b57d9225 JM |
1074 | insn = PATTERN (insn); |
1075 | if (GET_CODE (insn) == PARALLEL) | |
1076 | insn = XVECEXP (insn, 0, 0); | |
1077 | if (GET_CODE (insn) == SET) | |
1078 | insn = SET_SRC (insn); | |
3db35af4 MM |
1079 | if (GET_CODE (insn) != CALL) |
1080 | abort (); | |
2ad9852d | 1081 | |
b57d9225 JM |
1082 | dwarf2out_args_size ("", INTVAL (XEXP (insn, 1))); |
1083 | return; | |
1084 | } | |
1085 | ||
1086 | /* If only calls can throw, and we have a frame pointer, | |
1087 | save up adjustments until we see the CALL_INSN. */ | |
2ad9852d | 1088 | else if (!flag_asynchronous_unwind_tables && cfa.reg != STACK_POINTER_REGNUM) |
b57d9225 JM |
1089 | return; |
1090 | ||
6020d360 | 1091 | if (GET_CODE (insn) == BARRIER) |
0021b564 | 1092 | { |
6020d360 JM |
1093 | /* When we see a BARRIER, we know to reset args_size to 0. Usually |
1094 | the compiler will have already emitted a stack adjustment, but | |
1095 | doesn't bother for calls to noreturn functions. */ | |
1096 | #ifdef STACK_GROWS_DOWNWARD | |
1097 | offset = -args_size; | |
1098 | #else | |
1099 | offset = args_size; | |
1100 | #endif | |
0021b564 | 1101 | } |
6020d360 | 1102 | else if (GET_CODE (PATTERN (insn)) == SET) |
2ad9852d | 1103 | offset = stack_adjust_offset (PATTERN (insn)); |
1ba5ae8f AH |
1104 | else if (GET_CODE (PATTERN (insn)) == PARALLEL |
1105 | || GET_CODE (PATTERN (insn)) == SEQUENCE) | |
1106 | { | |
1107 | /* There may be stack adjustments inside compound insns. Search | |
2ad9852d RK |
1108 | for them. */ |
1109 | for (offset = 0, i = XVECLEN (PATTERN (insn), 0) - 1; i >= 0; i--) | |
1110 | if (GET_CODE (XVECEXP (PATTERN (insn), 0, i)) == SET) | |
1111 | offset += stack_adjust_offset (XVECEXP (PATTERN (insn), 0, i)); | |
0021b564 JM |
1112 | } |
1113 | else | |
1114 | return; | |
0b34cf1e | 1115 | |
6020d360 JM |
1116 | if (offset == 0) |
1117 | return; | |
1118 | ||
7d9d8943 AM |
1119 | if (cfa.reg == STACK_POINTER_REGNUM) |
1120 | cfa.offset += offset; | |
0021b564 JM |
1121 | |
1122 | #ifndef STACK_GROWS_DOWNWARD | |
1123 | offset = -offset; | |
1124 | #endif | |
2ad9852d | 1125 | |
0021b564 JM |
1126 | args_size += offset; |
1127 | if (args_size < 0) | |
1128 | args_size = 0; | |
1129 | ||
1130 | label = dwarf2out_cfi_label (); | |
7d9d8943 | 1131 | def_cfa_1 (label, &cfa); |
0021b564 JM |
1132 | dwarf2out_args_size (label, args_size); |
1133 | } | |
1134 | ||
17211ab5 GK |
1135 | #endif |
1136 | ||
fbfa55b0 RH |
1137 | /* We delay emitting a register save until either (a) we reach the end |
1138 | of the prologue or (b) the register is clobbered. This clusters | |
1139 | register saves so that there are fewer pc advances. */ | |
1140 | ||
17211ab5 | 1141 | struct queued_reg_save GTY(()) |
fbfa55b0 RH |
1142 | { |
1143 | struct queued_reg_save *next; | |
1144 | rtx reg; | |
799f628a | 1145 | HOST_WIDE_INT cfa_offset; |
fbfa55b0 RH |
1146 | }; |
1147 | ||
17211ab5 GK |
1148 | static GTY(()) struct queued_reg_save *queued_reg_saves; |
1149 | ||
1150 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
fbfa55b0 RH |
1151 | static const char *last_reg_save_label; |
1152 | ||
1153 | static void | |
799f628a | 1154 | queue_reg_save (const char *label, rtx reg, HOST_WIDE_INT offset) |
fbfa55b0 | 1155 | { |
17211ab5 | 1156 | struct queued_reg_save *q = ggc_alloc (sizeof (*q)); |
fbfa55b0 RH |
1157 | |
1158 | q->next = queued_reg_saves; | |
1159 | q->reg = reg; | |
1160 | q->cfa_offset = offset; | |
1161 | queued_reg_saves = q; | |
1162 | ||
1163 | last_reg_save_label = label; | |
1164 | } | |
1165 | ||
1166 | static void | |
7080f735 | 1167 | flush_queued_reg_saves (void) |
fbfa55b0 RH |
1168 | { |
1169 | struct queued_reg_save *q, *next; | |
1170 | ||
c26fbbca | 1171 | for (q = queued_reg_saves; q; q = next) |
fbfa55b0 RH |
1172 | { |
1173 | dwarf2out_reg_save (last_reg_save_label, REGNO (q->reg), q->cfa_offset); | |
1174 | next = q->next; | |
fbfa55b0 RH |
1175 | } |
1176 | ||
1177 | queued_reg_saves = NULL; | |
1178 | last_reg_save_label = NULL; | |
1179 | } | |
1180 | ||
1181 | static bool | |
7080f735 | 1182 | clobbers_queued_reg_save (rtx insn) |
fbfa55b0 RH |
1183 | { |
1184 | struct queued_reg_save *q; | |
1185 | ||
c26fbbca | 1186 | for (q = queued_reg_saves; q; q = q->next) |
fbfa55b0 RH |
1187 | if (modified_in_p (q->reg, insn)) |
1188 | return true; | |
1189 | ||
1190 | return false; | |
1191 | } | |
c26fbbca | 1192 | |
fbfa55b0 | 1193 | |
770ca8c6 JO |
1194 | /* A temporary register holding an integral value used in adjusting SP |
1195 | or setting up the store_reg. The "offset" field holds the integer | |
1196 | value, not an offset. */ | |
fbfa55b0 | 1197 | static dw_cfa_location cfa_temp; |
770ca8c6 JO |
1198 | |
1199 | /* Record call frame debugging information for an expression EXPR, | |
1200 | which either sets SP or FP (adjusting how we calculate the frame | |
1201 | address) or saves a register to the stack. LABEL indicates the | |
1202 | address of EXPR. | |
1203 | ||
1204 | This function encodes a state machine mapping rtxes to actions on | |
1205 | cfa, cfa_store, and cfa_temp.reg. We describe these rules so | |
1206 | users need not read the source code. | |
1207 | ||
a401107d JO |
1208 | The High-Level Picture |
1209 | ||
1210 | Changes in the register we use to calculate the CFA: Currently we | |
1211 | assume that if you copy the CFA register into another register, we | |
1212 | should take the other one as the new CFA register; this seems to | |
1213 | work pretty well. If it's wrong for some target, it's simple | |
1214 | enough not to set RTX_FRAME_RELATED_P on the insn in question. | |
1215 | ||
1216 | Changes in the register we use for saving registers to the stack: | |
1217 | This is usually SP, but not always. Again, we deduce that if you | |
1218 | copy SP into another register (and SP is not the CFA register), | |
1219 | then the new register is the one we will be using for register | |
1220 | saves. This also seems to work. | |
1221 | ||
1222 | Register saves: There's not much guesswork about this one; if | |
1223 | RTX_FRAME_RELATED_P is set on an insn which modifies memory, it's a | |
1224 | register save, and the register used to calculate the destination | |
1225 | had better be the one we think we're using for this purpose. | |
1226 | ||
1227 | Except: If the register being saved is the CFA register, and the | |
cc2902df | 1228 | offset is nonzero, we are saving the CFA, so we assume we have to |
a401107d JO |
1229 | use DW_CFA_def_cfa_expression. If the offset is 0, we assume that |
1230 | the intent is to save the value of SP from the previous frame. | |
1231 | ||
770ca8c6 JO |
1232 | Invariants / Summaries of Rules |
1233 | ||
a401107d JO |
1234 | cfa current rule for calculating the CFA. It usually |
1235 | consists of a register and an offset. | |
770ca8c6 JO |
1236 | cfa_store register used by prologue code to save things to the stack |
1237 | cfa_store.offset is the offset from the value of | |
1238 | cfa_store.reg to the actual CFA | |
1239 | cfa_temp register holding an integral value. cfa_temp.offset | |
1240 | stores the value, which will be used to adjust the | |
19ec6a36 AM |
1241 | stack pointer. cfa_temp is also used like cfa_store, |
1242 | to track stores to the stack via fp or a temp reg. | |
c26fbbca | 1243 | |
770ca8c6 | 1244 | Rules 1- 4: Setting a register's value to cfa.reg or an expression |
7080f735 | 1245 | with cfa.reg as the first operand changes the cfa.reg and its |
19ec6a36 AM |
1246 | cfa.offset. Rule 1 and 4 also set cfa_temp.reg and |
1247 | cfa_temp.offset. | |
770ca8c6 JO |
1248 | |
1249 | Rules 6- 9: Set a non-cfa.reg register value to a constant or an | |
1250 | expression yielding a constant. This sets cfa_temp.reg | |
1251 | and cfa_temp.offset. | |
1252 | ||
1253 | Rule 5: Create a new register cfa_store used to save items to the | |
1254 | stack. | |
1255 | ||
19ec6a36 | 1256 | Rules 10-14: Save a register to the stack. Define offset as the |
a401107d | 1257 | difference of the original location and cfa_store's |
19ec6a36 | 1258 | location (or cfa_temp's location if cfa_temp is used). |
770ca8c6 JO |
1259 | |
1260 | The Rules | |
1261 | ||
1262 | "{a,b}" indicates a choice of a xor b. | |
1263 | "<reg>:cfa.reg" indicates that <reg> must equal cfa.reg. | |
1264 | ||
1265 | Rule 1: | |
1266 | (set <reg1> <reg2>:cfa.reg) | |
19ec6a36 | 1267 | effects: cfa.reg = <reg1> |
73c68f61 | 1268 | cfa.offset unchanged |
19ec6a36 AM |
1269 | cfa_temp.reg = <reg1> |
1270 | cfa_temp.offset = cfa.offset | |
770ca8c6 JO |
1271 | |
1272 | Rule 2: | |
2ad9852d RK |
1273 | (set sp ({minus,plus,losum} {sp,fp}:cfa.reg |
1274 | {<const_int>,<reg>:cfa_temp.reg})) | |
770ca8c6 | 1275 | effects: cfa.reg = sp if fp used |
7080f735 | 1276 | cfa.offset += {+/- <const_int>, cfa_temp.offset} if cfa.reg==sp |
770ca8c6 JO |
1277 | cfa_store.offset += {+/- <const_int>, cfa_temp.offset} |
1278 | if cfa_store.reg==sp | |
1279 | ||
1280 | Rule 3: | |
19ec6a36 | 1281 | (set fp ({minus,plus,losum} <reg>:cfa.reg <const_int>)) |
770ca8c6 | 1282 | effects: cfa.reg = fp |
7080f735 | 1283 | cfa_offset += +/- <const_int> |
770ca8c6 JO |
1284 | |
1285 | Rule 4: | |
19ec6a36 | 1286 | (set <reg1> ({plus,losum} <reg2>:cfa.reg <const_int>)) |
770ca8c6 | 1287 | constraints: <reg1> != fp |
7080f735 | 1288 | <reg1> != sp |
770ca8c6 | 1289 | effects: cfa.reg = <reg1> |
19ec6a36 AM |
1290 | cfa_temp.reg = <reg1> |
1291 | cfa_temp.offset = cfa.offset | |
770ca8c6 JO |
1292 | |
1293 | Rule 5: | |
1294 | (set <reg1> (plus <reg2>:cfa_temp.reg sp:cfa.reg)) | |
1295 | constraints: <reg1> != fp | |
7080f735 | 1296 | <reg1> != sp |
770ca8c6 | 1297 | effects: cfa_store.reg = <reg1> |
7080f735 | 1298 | cfa_store.offset = cfa.offset - cfa_temp.offset |
770ca8c6 JO |
1299 | |
1300 | Rule 6: | |
1301 | (set <reg> <const_int>) | |
1302 | effects: cfa_temp.reg = <reg> | |
7080f735 | 1303 | cfa_temp.offset = <const_int> |
770ca8c6 JO |
1304 | |
1305 | Rule 7: | |
1306 | (set <reg1>:cfa_temp.reg (ior <reg2>:cfa_temp.reg <const_int>)) | |
1307 | effects: cfa_temp.reg = <reg1> | |
1308 | cfa_temp.offset |= <const_int> | |
1309 | ||
1310 | Rule 8: | |
1311 | (set <reg> (high <exp>)) | |
1312 | effects: none | |
1313 | ||
1314 | Rule 9: | |
1315 | (set <reg> (lo_sum <exp> <const_int>)) | |
1316 | effects: cfa_temp.reg = <reg> | |
7080f735 | 1317 | cfa_temp.offset = <const_int> |
770ca8c6 JO |
1318 | |
1319 | Rule 10: | |
1320 | (set (mem (pre_modify sp:cfa_store (???? <reg1> <const_int>))) <reg2>) | |
1321 | effects: cfa_store.offset -= <const_int> | |
1322 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
770ca8c6 | 1323 | cfa.reg = sp |
19ec6a36 | 1324 | cfa.base_offset = -cfa_store.offset |
770ca8c6 JO |
1325 | |
1326 | Rule 11: | |
1327 | (set (mem ({pre_inc,pre_dec} sp:cfa_store.reg)) <reg>) | |
1328 | effects: cfa_store.offset += -/+ mode_size(mem) | |
1329 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
770ca8c6 | 1330 | cfa.reg = sp |
19ec6a36 | 1331 | cfa.base_offset = -cfa_store.offset |
770ca8c6 JO |
1332 | |
1333 | Rule 12: | |
2ad9852d RK |
1334 | (set (mem ({minus,plus,losum} <reg1>:{cfa_store,cfa_temp} <const_int>)) |
1335 | ||
1336 | <reg2>) | |
19ec6a36 AM |
1337 | effects: cfa.reg = <reg1> |
1338 | cfa.base_offset = -/+ <const_int> - {cfa_store,cfa_temp}.offset | |
770ca8c6 JO |
1339 | |
1340 | Rule 13: | |
19ec6a36 AM |
1341 | (set (mem <reg1>:{cfa_store,cfa_temp}) <reg2>) |
1342 | effects: cfa.reg = <reg1> | |
1343 | cfa.base_offset = -{cfa_store,cfa_temp}.offset | |
1344 | ||
1345 | Rule 14: | |
1346 | (set (mem (postinc <reg1>:cfa_temp <const_int>)) <reg2>) | |
1347 | effects: cfa.reg = <reg1> | |
1348 | cfa.base_offset = -cfa_temp.offset | |
1349 | cfa_temp.offset -= mode_size(mem) */ | |
b664de3a AM |
1350 | |
1351 | static void | |
7080f735 | 1352 | dwarf2out_frame_debug_expr (rtx expr, const char *label) |
b664de3a AM |
1353 | { |
1354 | rtx src, dest; | |
2ad9852d | 1355 | HOST_WIDE_INT offset; |
556273e0 KH |
1356 | |
1357 | /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of | |
1358 | the PARALLEL independently. The first element is always processed if | |
770ca8c6 | 1359 | it is a SET. This is for backward compatibility. Other elements |
556273e0 KH |
1360 | are processed only if they are SETs and the RTX_FRAME_RELATED_P |
1361 | flag is set in them. */ | |
2ad9852d | 1362 | if (GET_CODE (expr) == PARALLEL || GET_CODE (expr) == SEQUENCE) |
556273e0 | 1363 | { |
b664de3a AM |
1364 | int par_index; |
1365 | int limit = XVECLEN (expr, 0); | |
1366 | ||
1367 | for (par_index = 0; par_index < limit; par_index++) | |
2ad9852d RK |
1368 | if (GET_CODE (XVECEXP (expr, 0, par_index)) == SET |
1369 | && (RTX_FRAME_RELATED_P (XVECEXP (expr, 0, par_index)) | |
1370 | || par_index == 0)) | |
1371 | dwarf2out_frame_debug_expr (XVECEXP (expr, 0, par_index), label); | |
556273e0 | 1372 | |
b664de3a AM |
1373 | return; |
1374 | } | |
556273e0 | 1375 | |
b664de3a AM |
1376 | if (GET_CODE (expr) != SET) |
1377 | abort (); | |
1378 | ||
1379 | src = SET_SRC (expr); | |
1380 | dest = SET_DEST (expr); | |
1381 | ||
1382 | switch (GET_CODE (dest)) | |
1383 | { | |
1384 | case REG: | |
770ca8c6 | 1385 | /* Rule 1 */ |
b664de3a | 1386 | /* Update the CFA rule wrt SP or FP. Make sure src is |
73c68f61 | 1387 | relative to the current CFA register. */ |
b664de3a | 1388 | switch (GET_CODE (src)) |
556273e0 KH |
1389 | { |
1390 | /* Setting FP from SP. */ | |
1391 | case REG: | |
1392 | if (cfa.reg == (unsigned) REGNO (src)) | |
1393 | /* OK. */ | |
1394 | ; | |
626d1efd | 1395 | else |
556273e0 | 1396 | abort (); |
2c849145 JM |
1397 | |
1398 | /* We used to require that dest be either SP or FP, but the | |
1399 | ARM copies SP to a temporary register, and from there to | |
1400 | FP. So we just rely on the backends to only set | |
1401 | RTX_FRAME_RELATED_P on appropriate insns. */ | |
556273e0 | 1402 | cfa.reg = REGNO (dest); |
19ec6a36 AM |
1403 | cfa_temp.reg = cfa.reg; |
1404 | cfa_temp.offset = cfa.offset; | |
556273e0 | 1405 | break; |
b664de3a | 1406 | |
556273e0 KH |
1407 | case PLUS: |
1408 | case MINUS: | |
19ec6a36 | 1409 | case LO_SUM: |
556273e0 KH |
1410 | if (dest == stack_pointer_rtx) |
1411 | { | |
770ca8c6 | 1412 | /* Rule 2 */ |
2618f955 MM |
1413 | /* Adjusting SP. */ |
1414 | switch (GET_CODE (XEXP (src, 1))) | |
1415 | { | |
1416 | case CONST_INT: | |
1417 | offset = INTVAL (XEXP (src, 1)); | |
1418 | break; | |
1419 | case REG: | |
770ca8c6 | 1420 | if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp.reg) |
2618f955 | 1421 | abort (); |
770ca8c6 | 1422 | offset = cfa_temp.offset; |
2618f955 MM |
1423 | break; |
1424 | default: | |
1425 | abort (); | |
1426 | } | |
1427 | ||
1428 | if (XEXP (src, 0) == hard_frame_pointer_rtx) | |
1429 | { | |
1430 | /* Restoring SP from FP in the epilogue. */ | |
7d9d8943 | 1431 | if (cfa.reg != (unsigned) HARD_FRAME_POINTER_REGNUM) |
2618f955 | 1432 | abort (); |
7d9d8943 | 1433 | cfa.reg = STACK_POINTER_REGNUM; |
2618f955 | 1434 | } |
19ec6a36 AM |
1435 | else if (GET_CODE (src) == LO_SUM) |
1436 | /* Assume we've set the source reg of the LO_SUM from sp. */ | |
1437 | ; | |
2618f955 MM |
1438 | else if (XEXP (src, 0) != stack_pointer_rtx) |
1439 | abort (); | |
1440 | ||
19ec6a36 | 1441 | if (GET_CODE (src) != MINUS) |
2618f955 | 1442 | offset = -offset; |
7d9d8943 AM |
1443 | if (cfa.reg == STACK_POINTER_REGNUM) |
1444 | cfa.offset += offset; | |
1445 | if (cfa_store.reg == STACK_POINTER_REGNUM) | |
1446 | cfa_store.offset += offset; | |
556273e0 KH |
1447 | } |
1448 | else if (dest == hard_frame_pointer_rtx) | |
1449 | { | |
770ca8c6 | 1450 | /* Rule 3 */ |
2618f955 MM |
1451 | /* Either setting the FP from an offset of the SP, |
1452 | or adjusting the FP */ | |
2c849145 | 1453 | if (! frame_pointer_needed) |
2618f955 MM |
1454 | abort (); |
1455 | ||
2c849145 | 1456 | if (GET_CODE (XEXP (src, 0)) == REG |
7d9d8943 | 1457 | && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg |
2618f955 MM |
1458 | && GET_CODE (XEXP (src, 1)) == CONST_INT) |
1459 | { | |
2618f955 | 1460 | offset = INTVAL (XEXP (src, 1)); |
19ec6a36 | 1461 | if (GET_CODE (src) != MINUS) |
2618f955 | 1462 | offset = -offset; |
7d9d8943 AM |
1463 | cfa.offset += offset; |
1464 | cfa.reg = HARD_FRAME_POINTER_REGNUM; | |
2618f955 | 1465 | } |
556273e0 KH |
1466 | else |
1467 | abort (); | |
1468 | } | |
1469 | else | |
1470 | { | |
19ec6a36 | 1471 | if (GET_CODE (src) == MINUS) |
2618f955 | 1472 | abort (); |
b53ef1a2 | 1473 | |
770ca8c6 | 1474 | /* Rule 4 */ |
b53ef1a2 NC |
1475 | if (GET_CODE (XEXP (src, 0)) == REG |
1476 | && REGNO (XEXP (src, 0)) == cfa.reg | |
1477 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
34ce3d7b JM |
1478 | { |
1479 | /* Setting a temporary CFA register that will be copied | |
1480 | into the FP later on. */ | |
19ec6a36 | 1481 | offset = - INTVAL (XEXP (src, 1)); |
34ce3d7b JM |
1482 | cfa.offset += offset; |
1483 | cfa.reg = REGNO (dest); | |
19ec6a36 AM |
1484 | /* Or used to save regs to the stack. */ |
1485 | cfa_temp.reg = cfa.reg; | |
1486 | cfa_temp.offset = cfa.offset; | |
34ce3d7b | 1487 | } |
2ad9852d | 1488 | |
770ca8c6 | 1489 | /* Rule 5 */ |
19ec6a36 AM |
1490 | else if (GET_CODE (XEXP (src, 0)) == REG |
1491 | && REGNO (XEXP (src, 0)) == cfa_temp.reg | |
1492 | && XEXP (src, 1) == stack_pointer_rtx) | |
b53ef1a2 | 1493 | { |
00a42e21 JM |
1494 | /* Setting a scratch register that we will use instead |
1495 | of SP for saving registers to the stack. */ | |
b53ef1a2 NC |
1496 | if (cfa.reg != STACK_POINTER_REGNUM) |
1497 | abort (); | |
1498 | cfa_store.reg = REGNO (dest); | |
770ca8c6 | 1499 | cfa_store.offset = cfa.offset - cfa_temp.offset; |
b53ef1a2 | 1500 | } |
2ad9852d | 1501 | |
19ec6a36 AM |
1502 | /* Rule 9 */ |
1503 | else if (GET_CODE (src) == LO_SUM | |
1504 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
1505 | { | |
1506 | cfa_temp.reg = REGNO (dest); | |
1507 | cfa_temp.offset = INTVAL (XEXP (src, 1)); | |
1508 | } | |
1509 | else | |
1510 | abort (); | |
556273e0 KH |
1511 | } |
1512 | break; | |
b664de3a | 1513 | |
770ca8c6 | 1514 | /* Rule 6 */ |
556273e0 | 1515 | case CONST_INT: |
770ca8c6 JO |
1516 | cfa_temp.reg = REGNO (dest); |
1517 | cfa_temp.offset = INTVAL (src); | |
556273e0 | 1518 | break; |
b664de3a | 1519 | |
770ca8c6 | 1520 | /* Rule 7 */ |
556273e0 KH |
1521 | case IOR: |
1522 | if (GET_CODE (XEXP (src, 0)) != REG | |
770ca8c6 | 1523 | || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp.reg |
2618f955 | 1524 | || GET_CODE (XEXP (src, 1)) != CONST_INT) |
556273e0 | 1525 | abort (); |
2ad9852d | 1526 | |
770ca8c6 JO |
1527 | if ((unsigned) REGNO (dest) != cfa_temp.reg) |
1528 | cfa_temp.reg = REGNO (dest); | |
1529 | cfa_temp.offset |= INTVAL (XEXP (src, 1)); | |
556273e0 | 1530 | break; |
b664de3a | 1531 | |
9ae21d2a AM |
1532 | /* Skip over HIGH, assuming it will be followed by a LO_SUM, |
1533 | which will fill in all of the bits. */ | |
1534 | /* Rule 8 */ | |
1535 | case HIGH: | |
1536 | break; | |
1537 | ||
556273e0 KH |
1538 | default: |
1539 | abort (); | |
1540 | } | |
2ad9852d | 1541 | |
7d9d8943 | 1542 | def_cfa_1 (label, &cfa); |
2618f955 | 1543 | break; |
b664de3a | 1544 | |
2618f955 | 1545 | case MEM: |
2618f955 MM |
1546 | if (GET_CODE (src) != REG) |
1547 | abort (); | |
7d9d8943 | 1548 | |
7d9d8943 AM |
1549 | /* Saving a register to the stack. Make sure dest is relative to the |
1550 | CFA register. */ | |
2618f955 MM |
1551 | switch (GET_CODE (XEXP (dest, 0))) |
1552 | { | |
770ca8c6 | 1553 | /* Rule 10 */ |
2618f955 | 1554 | /* With a push. */ |
e2134eea JH |
1555 | case PRE_MODIFY: |
1556 | /* We can't handle variable size modifications. */ | |
1557 | if (GET_CODE (XEXP (XEXP (XEXP (dest, 0), 1), 1)) != CONST_INT) | |
173bf5be | 1558 | abort (); |
e2134eea JH |
1559 | offset = -INTVAL (XEXP (XEXP (XEXP (dest, 0), 1), 1)); |
1560 | ||
1561 | if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM | |
1562 | || cfa_store.reg != STACK_POINTER_REGNUM) | |
1563 | abort (); | |
2ad9852d | 1564 | |
e2134eea JH |
1565 | cfa_store.offset += offset; |
1566 | if (cfa.reg == STACK_POINTER_REGNUM) | |
1567 | cfa.offset = cfa_store.offset; | |
1568 | ||
1569 | offset = -cfa_store.offset; | |
1570 | break; | |
2ad9852d | 1571 | |
770ca8c6 | 1572 | /* Rule 11 */ |
2618f955 MM |
1573 | case PRE_INC: |
1574 | case PRE_DEC: | |
1575 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1576 | if (GET_CODE (XEXP (dest, 0)) == PRE_INC) | |
1577 | offset = -offset; | |
b664de3a | 1578 | |
2618f955 | 1579 | if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM |
7d9d8943 | 1580 | || cfa_store.reg != STACK_POINTER_REGNUM) |
2618f955 | 1581 | abort (); |
2ad9852d | 1582 | |
7d9d8943 AM |
1583 | cfa_store.offset += offset; |
1584 | if (cfa.reg == STACK_POINTER_REGNUM) | |
1585 | cfa.offset = cfa_store.offset; | |
b664de3a | 1586 | |
7d9d8943 | 1587 | offset = -cfa_store.offset; |
2618f955 | 1588 | break; |
b664de3a | 1589 | |
770ca8c6 | 1590 | /* Rule 12 */ |
2618f955 MM |
1591 | /* With an offset. */ |
1592 | case PLUS: | |
1593 | case MINUS: | |
19ec6a36 | 1594 | case LO_SUM: |
770ca8c6 JO |
1595 | if (GET_CODE (XEXP (XEXP (dest, 0), 1)) != CONST_INT) |
1596 | abort (); | |
2618f955 MM |
1597 | offset = INTVAL (XEXP (XEXP (dest, 0), 1)); |
1598 | if (GET_CODE (XEXP (dest, 0)) == MINUS) | |
1599 | offset = -offset; | |
b664de3a | 1600 | |
19ec6a36 AM |
1601 | if (cfa_store.reg == (unsigned) REGNO (XEXP (XEXP (dest, 0), 0))) |
1602 | offset -= cfa_store.offset; | |
1603 | else if (cfa_temp.reg == (unsigned) REGNO (XEXP (XEXP (dest, 0), 0))) | |
1604 | offset -= cfa_temp.offset; | |
1605 | else | |
2618f955 | 1606 | abort (); |
2618f955 MM |
1607 | break; |
1608 | ||
770ca8c6 | 1609 | /* Rule 13 */ |
2618f955 MM |
1610 | /* Without an offset. */ |
1611 | case REG: | |
19ec6a36 AM |
1612 | if (cfa_store.reg == (unsigned) REGNO (XEXP (dest, 0))) |
1613 | offset = -cfa_store.offset; | |
1614 | else if (cfa_temp.reg == (unsigned) REGNO (XEXP (dest, 0))) | |
1615 | offset = -cfa_temp.offset; | |
1616 | else | |
556273e0 | 1617 | abort (); |
19ec6a36 AM |
1618 | break; |
1619 | ||
1620 | /* Rule 14 */ | |
1621 | case POST_INC: | |
1622 | if (cfa_temp.reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0))) | |
1623 | abort (); | |
1624 | offset = -cfa_temp.offset; | |
1625 | cfa_temp.offset -= GET_MODE_SIZE (GET_MODE (dest)); | |
2618f955 MM |
1626 | break; |
1627 | ||
1628 | default: | |
1629 | abort (); | |
1630 | } | |
e09bbb25 | 1631 | |
556273e0 | 1632 | if (REGNO (src) != STACK_POINTER_REGNUM |
e09bbb25 JM |
1633 | && REGNO (src) != HARD_FRAME_POINTER_REGNUM |
1634 | && (unsigned) REGNO (src) == cfa.reg) | |
1635 | { | |
1636 | /* We're storing the current CFA reg into the stack. */ | |
1637 | ||
1638 | if (cfa.offset == 0) | |
1639 | { | |
1640 | /* If the source register is exactly the CFA, assume | |
1641 | we're saving SP like any other register; this happens | |
1642 | on the ARM. */ | |
e09bbb25 | 1643 | def_cfa_1 (label, &cfa); |
fbfa55b0 | 1644 | queue_reg_save (label, stack_pointer_rtx, offset); |
e09bbb25 JM |
1645 | break; |
1646 | } | |
1647 | else | |
1648 | { | |
1649 | /* Otherwise, we'll need to look in the stack to | |
73c68f61 | 1650 | calculate the CFA. */ |
e09bbb25 | 1651 | rtx x = XEXP (dest, 0); |
2ad9852d | 1652 | |
e09bbb25 JM |
1653 | if (GET_CODE (x) != REG) |
1654 | x = XEXP (x, 0); | |
1655 | if (GET_CODE (x) != REG) | |
1656 | abort (); | |
2ad9852d RK |
1657 | |
1658 | cfa.reg = REGNO (x); | |
e09bbb25 JM |
1659 | cfa.base_offset = offset; |
1660 | cfa.indirect = 1; | |
1661 | def_cfa_1 (label, &cfa); | |
1662 | break; | |
1663 | } | |
1664 | } | |
1665 | ||
7d9d8943 | 1666 | def_cfa_1 (label, &cfa); |
fbfa55b0 | 1667 | queue_reg_save (label, src, offset); |
2618f955 MM |
1668 | break; |
1669 | ||
1670 | default: | |
1671 | abort (); | |
1672 | } | |
b664de3a AM |
1673 | } |
1674 | ||
3f76745e JM |
1675 | /* Record call frame debugging information for INSN, which either |
1676 | sets SP or FP (adjusting how we calculate the frame address) or saves a | |
1677 | register to the stack. If INSN is NULL_RTX, initialize our state. */ | |
71dfc51f | 1678 | |
3f76745e | 1679 | void |
7080f735 | 1680 | dwarf2out_frame_debug (rtx insn) |
a3f97cbb | 1681 | { |
d3e3972c | 1682 | const char *label; |
b664de3a | 1683 | rtx src; |
3f76745e JM |
1684 | |
1685 | if (insn == NULL_RTX) | |
a3f97cbb | 1686 | { |
fbfa55b0 RH |
1687 | /* Flush any queued register saves. */ |
1688 | flush_queued_reg_saves (); | |
1689 | ||
3f76745e | 1690 | /* Set up state for generating call frame debug info. */ |
7d9d8943 AM |
1691 | lookup_cfa (&cfa); |
1692 | if (cfa.reg != (unsigned long) DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM)) | |
3a88cbd1 | 1693 | abort (); |
2ad9852d | 1694 | |
7d9d8943 AM |
1695 | cfa.reg = STACK_POINTER_REGNUM; |
1696 | cfa_store = cfa; | |
770ca8c6 JO |
1697 | cfa_temp.reg = -1; |
1698 | cfa_temp.offset = 0; | |
3f76745e JM |
1699 | return; |
1700 | } | |
1701 | ||
fbfa55b0 RH |
1702 | if (GET_CODE (insn) != INSN || clobbers_queued_reg_save (insn)) |
1703 | flush_queued_reg_saves (); | |
1704 | ||
0021b564 JM |
1705 | if (! RTX_FRAME_RELATED_P (insn)) |
1706 | { | |
fbfa55b0 | 1707 | if (!ACCUMULATE_OUTGOING_ARGS) |
c26fbbca | 1708 | dwarf2out_stack_adjust (insn); |
2ad9852d | 1709 | |
0021b564 JM |
1710 | return; |
1711 | } | |
1712 | ||
3f76745e | 1713 | label = dwarf2out_cfi_label (); |
07ebc930 RH |
1714 | src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX); |
1715 | if (src) | |
1716 | insn = XEXP (src, 0); | |
556273e0 | 1717 | else |
07ebc930 RH |
1718 | insn = PATTERN (insn); |
1719 | ||
b664de3a | 1720 | dwarf2out_frame_debug_expr (insn, label); |
3f76745e JM |
1721 | } |
1722 | ||
17211ab5 GK |
1723 | #endif |
1724 | ||
1725 | /* Describe for the GTY machinery what parts of dw_cfi_oprnd1 are used. */ | |
7080f735 AJ |
1726 | static enum dw_cfi_oprnd_type dw_cfi_oprnd1_desc |
1727 | (enum dwarf_call_frame_info cfi); | |
17211ab5 GK |
1728 | |
1729 | static enum dw_cfi_oprnd_type | |
7080f735 | 1730 | dw_cfi_oprnd1_desc (enum dwarf_call_frame_info cfi) |
17211ab5 GK |
1731 | { |
1732 | switch (cfi) | |
1733 | { | |
1734 | case DW_CFA_nop: | |
1735 | case DW_CFA_GNU_window_save: | |
1736 | return dw_cfi_oprnd_unused; | |
1737 | ||
1738 | case DW_CFA_set_loc: | |
1739 | case DW_CFA_advance_loc1: | |
1740 | case DW_CFA_advance_loc2: | |
1741 | case DW_CFA_advance_loc4: | |
1742 | case DW_CFA_MIPS_advance_loc8: | |
1743 | return dw_cfi_oprnd_addr; | |
1744 | ||
1745 | case DW_CFA_offset: | |
1746 | case DW_CFA_offset_extended: | |
1747 | case DW_CFA_def_cfa: | |
1748 | case DW_CFA_offset_extended_sf: | |
1749 | case DW_CFA_def_cfa_sf: | |
1750 | case DW_CFA_restore_extended: | |
1751 | case DW_CFA_undefined: | |
1752 | case DW_CFA_same_value: | |
1753 | case DW_CFA_def_cfa_register: | |
1754 | case DW_CFA_register: | |
1755 | return dw_cfi_oprnd_reg_num; | |
1756 | ||
1757 | case DW_CFA_def_cfa_offset: | |
1758 | case DW_CFA_GNU_args_size: | |
1759 | case DW_CFA_def_cfa_offset_sf: | |
1760 | return dw_cfi_oprnd_offset; | |
7080f735 | 1761 | |
17211ab5 GK |
1762 | case DW_CFA_def_cfa_expression: |
1763 | case DW_CFA_expression: | |
1764 | return dw_cfi_oprnd_loc; | |
1765 | ||
1766 | default: | |
1767 | abort (); | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | /* Describe for the GTY machinery what parts of dw_cfi_oprnd2 are used. */ | |
7080f735 AJ |
1772 | static enum dw_cfi_oprnd_type dw_cfi_oprnd2_desc |
1773 | (enum dwarf_call_frame_info cfi); | |
17211ab5 GK |
1774 | |
1775 | static enum dw_cfi_oprnd_type | |
7080f735 | 1776 | dw_cfi_oprnd2_desc (enum dwarf_call_frame_info cfi) |
17211ab5 GK |
1777 | { |
1778 | switch (cfi) | |
1779 | { | |
1780 | case DW_CFA_def_cfa: | |
1781 | case DW_CFA_def_cfa_sf: | |
1782 | case DW_CFA_offset: | |
1783 | case DW_CFA_offset_extended_sf: | |
1784 | case DW_CFA_offset_extended: | |
1785 | return dw_cfi_oprnd_offset; | |
1786 | ||
1787 | case DW_CFA_register: | |
1788 | return dw_cfi_oprnd_reg_num; | |
1789 | ||
1790 | default: | |
1791 | return dw_cfi_oprnd_unused; | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
1796 | ||
34c80057 AM |
1797 | /* Map register numbers held in the call frame info that gcc has |
1798 | collected using DWARF_FRAME_REGNUM to those that should be output in | |
1799 | .debug_frame and .eh_frame. */ | |
1800 | #ifndef DWARF2_FRAME_REG_OUT | |
1801 | #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO) | |
1802 | #endif | |
1803 | ||
3f76745e JM |
1804 | /* Output a Call Frame Information opcode and its operand(s). */ |
1805 | ||
1806 | static void | |
7080f735 | 1807 | output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh) |
3f76745e | 1808 | { |
34c80057 | 1809 | unsigned long r; |
3f76745e | 1810 | if (cfi->dw_cfi_opc == DW_CFA_advance_loc) |
2ad9852d RK |
1811 | dw2_asm_output_data (1, (cfi->dw_cfi_opc |
1812 | | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f)), | |
38f9cd4c | 1813 | "DW_CFA_advance_loc " HOST_WIDE_INT_PRINT_HEX, |
2ad9852d | 1814 | cfi->dw_cfi_oprnd1.dw_cfi_offset); |
3f76745e JM |
1815 | else if (cfi->dw_cfi_opc == DW_CFA_offset) |
1816 | { | |
34c80057 AM |
1817 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
1818 | dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)), | |
1819 | "DW_CFA_offset, column 0x%lx", r); | |
2e4b9b8c | 1820 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
3f76745e JM |
1821 | } |
1822 | else if (cfi->dw_cfi_opc == DW_CFA_restore) | |
34c80057 AM |
1823 | { |
1824 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); | |
1825 | dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)), | |
1826 | "DW_CFA_restore, column 0x%lx", r); | |
1827 | } | |
3f76745e JM |
1828 | else |
1829 | { | |
2e4b9b8c RH |
1830 | dw2_asm_output_data (1, cfi->dw_cfi_opc, |
1831 | "%s", dwarf_cfi_name (cfi->dw_cfi_opc)); | |
3f76745e | 1832 | |
3f76745e JM |
1833 | switch (cfi->dw_cfi_opc) |
1834 | { | |
1835 | case DW_CFA_set_loc: | |
e1f9550a RH |
1836 | if (for_eh) |
1837 | dw2_asm_output_encoded_addr_rtx ( | |
1838 | ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0), | |
1839 | gen_rtx_SYMBOL_REF (Pmode, cfi->dw_cfi_oprnd1.dw_cfi_addr), | |
1840 | NULL); | |
1841 | else | |
1842 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
1843 | cfi->dw_cfi_oprnd1.dw_cfi_addr, NULL); | |
3f76745e | 1844 | break; |
2ad9852d | 1845 | |
3f76745e | 1846 | case DW_CFA_advance_loc1: |
2e4b9b8c RH |
1847 | dw2_asm_output_delta (1, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1848 | fde->dw_fde_current_label, NULL); | |
bb727b5a | 1849 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
3f76745e | 1850 | break; |
2ad9852d | 1851 | |
3f76745e | 1852 | case DW_CFA_advance_loc2: |
2e4b9b8c RH |
1853 | dw2_asm_output_delta (2, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1854 | fde->dw_fde_current_label, NULL); | |
3f76745e JM |
1855 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
1856 | break; | |
2ad9852d | 1857 | |
3f76745e | 1858 | case DW_CFA_advance_loc4: |
2e4b9b8c RH |
1859 | dw2_asm_output_delta (4, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1860 | fde->dw_fde_current_label, NULL); | |
3f76745e JM |
1861 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
1862 | break; | |
2ad9852d | 1863 | |
3f76745e | 1864 | case DW_CFA_MIPS_advance_loc8: |
2e4b9b8c RH |
1865 | dw2_asm_output_delta (8, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1866 | fde->dw_fde_current_label, NULL); | |
1867 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; | |
3f76745e | 1868 | break; |
2ad9852d | 1869 | |
3f76745e JM |
1870 | case DW_CFA_offset_extended: |
1871 | case DW_CFA_def_cfa: | |
34c80057 AM |
1872 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
1873 | dw2_asm_output_data_uleb128 (r, NULL); | |
2e4b9b8c | 1874 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
3f76745e | 1875 | break; |
2ad9852d | 1876 | |
6bb28965 JM |
1877 | case DW_CFA_offset_extended_sf: |
1878 | case DW_CFA_def_cfa_sf: | |
34c80057 AM |
1879 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
1880 | dw2_asm_output_data_uleb128 (r, NULL); | |
6bb28965 JM |
1881 | dw2_asm_output_data_sleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
1882 | break; | |
1883 | ||
3f76745e JM |
1884 | case DW_CFA_restore_extended: |
1885 | case DW_CFA_undefined: | |
3f76745e JM |
1886 | case DW_CFA_same_value: |
1887 | case DW_CFA_def_cfa_register: | |
34c80057 AM |
1888 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
1889 | dw2_asm_output_data_uleb128 (r, NULL); | |
3f76745e | 1890 | break; |
2ad9852d | 1891 | |
3f76745e | 1892 | case DW_CFA_register: |
34c80057 AM |
1893 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
1894 | dw2_asm_output_data_uleb128 (r, NULL); | |
1895 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd2.dw_cfi_reg_num, for_eh); | |
1896 | dw2_asm_output_data_uleb128 (r, NULL); | |
3f76745e | 1897 | break; |
2ad9852d | 1898 | |
3f76745e | 1899 | case DW_CFA_def_cfa_offset: |
2e4b9b8c RH |
1900 | case DW_CFA_GNU_args_size: |
1901 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset, NULL); | |
3f76745e | 1902 | break; |
2ad9852d | 1903 | |
6bb28965 JM |
1904 | case DW_CFA_def_cfa_offset_sf: |
1905 | dw2_asm_output_data_sleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset, NULL); | |
1906 | break; | |
1907 | ||
c53aa195 JM |
1908 | case DW_CFA_GNU_window_save: |
1909 | break; | |
2ad9852d | 1910 | |
7d9d8943 | 1911 | case DW_CFA_def_cfa_expression: |
6bb28965 | 1912 | case DW_CFA_expression: |
7d9d8943 AM |
1913 | output_cfa_loc (cfi); |
1914 | break; | |
2ad9852d | 1915 | |
6bb28965 JM |
1916 | case DW_CFA_GNU_negative_offset_extended: |
1917 | /* Obsoleted by DW_CFA_offset_extended_sf. */ | |
1918 | abort (); | |
1919 | ||
3f76745e JM |
1920 | default: |
1921 | break; | |
1922 | } | |
556273e0 | 1923 | } |
3f76745e JM |
1924 | } |
1925 | ||
34c80057 | 1926 | /* Output the call frame information used to record information |
3f76745e JM |
1927 | that relates to calculating the frame pointer, and records the |
1928 | location of saved registers. */ | |
1929 | ||
1930 | static void | |
7080f735 | 1931 | output_call_frame_info (int for_eh) |
3f76745e | 1932 | { |
b3694847 SS |
1933 | unsigned int i; |
1934 | dw_fde_ref fde; | |
1935 | dw_cfi_ref cfi; | |
27d95cbe | 1936 | char l1[20], l2[20], section_start_label[20]; |
ad5eeaa9 | 1937 | bool any_lsda_needed = false; |
52a11cbf | 1938 | char augmentation[6]; |
e1f9550a RH |
1939 | int augmentation_size; |
1940 | int fde_encoding = DW_EH_PE_absptr; | |
1941 | int per_encoding = DW_EH_PE_absptr; | |
1942 | int lsda_encoding = DW_EH_PE_absptr; | |
3f76745e | 1943 | |
29b91443 JM |
1944 | /* Don't emit a CIE if there won't be any FDEs. */ |
1945 | if (fde_table_in_use == 0) | |
1946 | return; | |
1947 | ||
4746cf84 MA |
1948 | /* If we make FDEs linkonce, we may have to emit an empty label for |
1949 | an FDE that wouldn't otherwise be emitted. We want to avoid | |
1950 | having an FDE kept around when the function it refers to is | |
1951 | discarded. (Example where this matters: a primary function | |
1952 | template in C++ requires EH information, but an explicit | |
1953 | specialization doesn't. */ | |
1954 | if (TARGET_USES_WEAK_UNWIND_INFO | |
1955 | && ! flag_asynchronous_unwind_tables | |
1956 | && for_eh) | |
1957 | for (i = 0; i < fde_table_in_use; i++) | |
1958 | if ((fde_table[i].nothrow || fde_table[i].all_throwers_are_sibcalls) | |
1959 | && !fde_table[i].uses_eh_lsda | |
1960 | && ! DECL_ONE_ONLY (fde_table[i].decl)) | |
5fd9b178 | 1961 | targetm.asm_out.unwind_label (asm_out_file, fde_table[i].decl, |
eeab4d81 | 1962 | for_eh, /* empty */ 1); |
4746cf84 | 1963 | |
ad5eeaa9 RH |
1964 | /* If we don't have any functions we'll want to unwind out of, don't |
1965 | emit any EH unwind information. Note that if exceptions aren't | |
1966 | enabled, we won't have collected nothrow information, and if we | |
1967 | asked for asynchronous tables, we always want this info. */ | |
737faf14 JM |
1968 | if (for_eh) |
1969 | { | |
ad5eeaa9 | 1970 | bool any_eh_needed = !flag_exceptions || flag_asynchronous_unwind_tables; |
2ad9852d RK |
1971 | |
1972 | for (i = 0; i < fde_table_in_use; i++) | |
52a11cbf | 1973 | if (fde_table[i].uses_eh_lsda) |
ad5eeaa9 | 1974 | any_eh_needed = any_lsda_needed = true; |
4746cf84 MA |
1975 | else if (TARGET_USES_WEAK_UNWIND_INFO |
1976 | && DECL_ONE_ONLY (fde_table[i].decl)) | |
1977 | any_eh_needed = 1; | |
0366359a GK |
1978 | else if (! fde_table[i].nothrow |
1979 | && ! fde_table[i].all_throwers_are_sibcalls) | |
ad5eeaa9 | 1980 | any_eh_needed = true; |
52a11cbf RH |
1981 | |
1982 | if (! any_eh_needed) | |
1983 | return; | |
737faf14 JM |
1984 | } |
1985 | ||
aa0c1401 JL |
1986 | /* We're going to be generating comments, so turn on app. */ |
1987 | if (flag_debug_asm) | |
1988 | app_enable (); | |
956d6950 | 1989 | |
3f76745e | 1990 | if (for_eh) |
5fd9b178 | 1991 | targetm.asm_out.eh_frame_section (); |
3f76745e | 1992 | else |
715bdd29 | 1993 | named_section_flags (DEBUG_FRAME_SECTION, SECTION_DEBUG); |
3f76745e | 1994 | |
27d95cbe RH |
1995 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, FRAME_BEGIN_LABEL, for_eh); |
1996 | ASM_OUTPUT_LABEL (asm_out_file, section_start_label); | |
1997 | ||
556273e0 | 1998 | /* Output the CIE. */ |
a6ab3aad JM |
1999 | ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh); |
2000 | ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh); | |
2e4b9b8c RH |
2001 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
2002 | "Length of Common Information Entry"); | |
a6ab3aad JM |
2003 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
2004 | ||
2e4b9b8c RH |
2005 | /* Now that the CIE pointer is PC-relative for EH, |
2006 | use 0 to identify the CIE. */ | |
2007 | dw2_asm_output_data ((for_eh ? 4 : DWARF_OFFSET_SIZE), | |
2008 | (for_eh ? 0 : DW_CIE_ID), | |
2009 | "CIE Identifier Tag"); | |
3f76745e | 2010 | |
2e4b9b8c | 2011 | dw2_asm_output_data (1, DW_CIE_VERSION, "CIE Version"); |
3f76745e | 2012 | |
52a11cbf | 2013 | augmentation[0] = 0; |
e1f9550a | 2014 | augmentation_size = 0; |
52a11cbf | 2015 | if (for_eh) |
a6ab3aad | 2016 | { |
e1f9550a RH |
2017 | char *p; |
2018 | ||
52a11cbf RH |
2019 | /* Augmentation: |
2020 | z Indicates that a uleb128 is present to size the | |
7080f735 | 2021 | augmentation section. |
e1f9550a RH |
2022 | L Indicates the encoding (and thus presence) of |
2023 | an LSDA pointer in the FDE augmentation. | |
2024 | R Indicates a non-default pointer encoding for | |
2025 | FDE code pointers. | |
2026 | P Indicates the presence of an encoding + language | |
2027 | personality routine in the CIE augmentation. */ | |
2028 | ||
4746cf84 MA |
2029 | fde_encoding = TARGET_USES_WEAK_UNWIND_INFO |
2030 | ? ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1) | |
2031 | : ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0); | |
e1f9550a RH |
2032 | per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1); |
2033 | lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0); | |
2034 | ||
2035 | p = augmentation + 1; | |
2036 | if (eh_personality_libfunc) | |
2037 | { | |
2038 | *p++ = 'P'; | |
2039 | augmentation_size += 1 + size_of_encoded_value (per_encoding); | |
2040 | } | |
52a11cbf | 2041 | if (any_lsda_needed) |
e1f9550a RH |
2042 | { |
2043 | *p++ = 'L'; | |
2044 | augmentation_size += 1; | |
2045 | } | |
2046 | if (fde_encoding != DW_EH_PE_absptr) | |
2047 | { | |
2048 | *p++ = 'R'; | |
2049 | augmentation_size += 1; | |
2050 | } | |
2051 | if (p > augmentation + 1) | |
2052 | { | |
2053 | augmentation[0] = 'z'; | |
c26fbbca | 2054 | *p = '\0'; |
e1f9550a | 2055 | } |
099c8b17 RH |
2056 | |
2057 | /* Ug. Some platforms can't do unaligned dynamic relocations at all. */ | |
2058 | if (eh_personality_libfunc && per_encoding == DW_EH_PE_aligned) | |
2059 | { | |
2060 | int offset = ( 4 /* Length */ | |
2061 | + 4 /* CIE Id */ | |
2062 | + 1 /* CIE version */ | |
2063 | + strlen (augmentation) + 1 /* Augmentation */ | |
2064 | + size_of_uleb128 (1) /* Code alignment */ | |
2065 | + size_of_sleb128 (DWARF_CIE_DATA_ALIGNMENT) | |
2066 | + 1 /* RA column */ | |
2067 | + 1 /* Augmentation size */ | |
2068 | + 1 /* Personality encoding */ ); | |
2069 | int pad = -offset & (PTR_SIZE - 1); | |
2070 | ||
2071 | augmentation_size += pad; | |
2072 | ||
2073 | /* Augmentations should be small, so there's scarce need to | |
2074 | iterate for a solution. Die if we exceed one uleb128 byte. */ | |
2075 | if (size_of_uleb128 (augmentation_size) != 1) | |
2076 | abort (); | |
2077 | } | |
a6ab3aad | 2078 | } |
3f76745e | 2079 | |
2ad9852d | 2080 | dw2_asm_output_nstring (augmentation, -1, "CIE Augmentation"); |
2e4b9b8c | 2081 | dw2_asm_output_data_uleb128 (1, "CIE Code Alignment Factor"); |
2e4b9b8c RH |
2082 | dw2_asm_output_data_sleb128 (DWARF_CIE_DATA_ALIGNMENT, |
2083 | "CIE Data Alignment Factor"); | |
2e4b9b8c | 2084 | dw2_asm_output_data (1, DWARF_FRAME_RETURN_COLUMN, "CIE RA Column"); |
3f76745e | 2085 | |
52a11cbf RH |
2086 | if (augmentation[0]) |
2087 | { | |
e1f9550a | 2088 | dw2_asm_output_data_uleb128 (augmentation_size, "Augmentation size"); |
52a11cbf | 2089 | if (eh_personality_libfunc) |
e1f9550a RH |
2090 | { |
2091 | dw2_asm_output_data (1, per_encoding, "Personality (%s)", | |
2092 | eh_data_format_name (per_encoding)); | |
2093 | dw2_asm_output_encoded_addr_rtx (per_encoding, | |
2094 | eh_personality_libfunc, NULL); | |
2095 | } | |
2ad9852d | 2096 | |
e1f9550a RH |
2097 | if (any_lsda_needed) |
2098 | dw2_asm_output_data (1, lsda_encoding, "LSDA Encoding (%s)", | |
2099 | eh_data_format_name (lsda_encoding)); | |
2ad9852d | 2100 | |
e1f9550a RH |
2101 | if (fde_encoding != DW_EH_PE_absptr) |
2102 | dw2_asm_output_data (1, fde_encoding, "FDE Encoding (%s)", | |
2103 | eh_data_format_name (fde_encoding)); | |
52a11cbf RH |
2104 | } |
2105 | ||
3f76745e | 2106 | for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next) |
12f0b96b | 2107 | output_cfi (cfi, NULL, for_eh); |
3f76745e JM |
2108 | |
2109 | /* Pad the CIE out to an address sized boundary. */ | |
c26fbbca | 2110 | ASM_OUTPUT_ALIGN (asm_out_file, |
12f0b96b | 2111 | floor_log2 (for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE)); |
a6ab3aad | 2112 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
3f76745e JM |
2113 | |
2114 | /* Loop through all of the FDE's. */ | |
2ad9852d | 2115 | for (i = 0; i < fde_table_in_use; i++) |
3f76745e JM |
2116 | { |
2117 | fde = &fde_table[i]; | |
3f76745e | 2118 | |
52a11cbf | 2119 | /* Don't emit EH unwind info for leaf functions that don't need it. */ |
ad5eeaa9 | 2120 | if (for_eh && !flag_asynchronous_unwind_tables && flag_exceptions |
b6128b8c | 2121 | && (fde->nothrow || fde->all_throwers_are_sibcalls) |
4746cf84 | 2122 | && (! TARGET_USES_WEAK_UNWIND_INFO || ! DECL_ONE_ONLY (fde->decl)) |
b6128b8c | 2123 | && !fde->uses_eh_lsda) |
737faf14 JM |
2124 | continue; |
2125 | ||
eeab4d81 | 2126 | targetm.asm_out.unwind_label (asm_out_file, fde->decl, for_eh, /* empty */ 0); |
5fd9b178 | 2127 | targetm.asm_out.internal_label (asm_out_file, FDE_LABEL, for_eh + i * 2); |
556273e0 KH |
2128 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i * 2); |
2129 | ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i * 2); | |
2e4b9b8c RH |
2130 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
2131 | "FDE Length"); | |
a6ab3aad JM |
2132 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
2133 | ||
3f76745e | 2134 | if (for_eh) |
27d95cbe | 2135 | dw2_asm_output_delta (4, l1, section_start_label, "FDE CIE offset"); |
3f76745e | 2136 | else |
27d95cbe | 2137 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, section_start_label, |
2e4b9b8c | 2138 | "FDE CIE offset"); |
3f76745e | 2139 | |
e1f9550a RH |
2140 | if (for_eh) |
2141 | { | |
4746cf84 MA |
2142 | if (TARGET_USES_WEAK_UNWIND_INFO |
2143 | && DECL_ONE_ONLY (fde->decl)) | |
2144 | dw2_asm_output_encoded_addr_rtx (fde_encoding, | |
2145 | gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER | |
2146 | (DECL_ASSEMBLER_NAME (fde->decl))), | |
2147 | "FDE initial location"); | |
2148 | else | |
2149 | dw2_asm_output_encoded_addr_rtx (fde_encoding, | |
2150 | gen_rtx_SYMBOL_REF (Pmode, fde->dw_fde_begin), | |
2151 | "FDE initial location"); | |
e1f9550a | 2152 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), |
c26fbbca | 2153 | fde->dw_fde_end, fde->dw_fde_begin, |
e1f9550a RH |
2154 | "FDE address range"); |
2155 | } | |
2156 | else | |
2157 | { | |
2158 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, fde->dw_fde_begin, | |
2159 | "FDE initial location"); | |
c26fbbca KH |
2160 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, |
2161 | fde->dw_fde_end, fde->dw_fde_begin, | |
e1f9550a RH |
2162 | "FDE address range"); |
2163 | } | |
3f76745e | 2164 | |
52a11cbf RH |
2165 | if (augmentation[0]) |
2166 | { | |
e1f9550a | 2167 | if (any_lsda_needed) |
52a11cbf | 2168 | { |
099c8b17 RH |
2169 | int size = size_of_encoded_value (lsda_encoding); |
2170 | ||
2171 | if (lsda_encoding == DW_EH_PE_aligned) | |
2172 | { | |
2173 | int offset = ( 4 /* Length */ | |
2174 | + 4 /* CIE offset */ | |
2175 | + 2 * size_of_encoded_value (fde_encoding) | |
2176 | + 1 /* Augmentation size */ ); | |
2177 | int pad = -offset & (PTR_SIZE - 1); | |
2178 | ||
2179 | size += pad; | |
2180 | if (size_of_uleb128 (size) != 1) | |
2181 | abort (); | |
2182 | } | |
2183 | ||
2184 | dw2_asm_output_data_uleb128 (size, "Augmentation size"); | |
e1f9550a RH |
2185 | |
2186 | if (fde->uses_eh_lsda) | |
73c68f61 SS |
2187 | { |
2188 | ASM_GENERATE_INTERNAL_LABEL (l1, "LLSDA", | |
e1f9550a | 2189 | fde->funcdef_number); |
73c68f61 | 2190 | dw2_asm_output_encoded_addr_rtx ( |
e1f9550a | 2191 | lsda_encoding, gen_rtx_SYMBOL_REF (Pmode, l1), |
7080f735 | 2192 | "Language Specific Data Area"); |
73c68f61 | 2193 | } |
e1f9550a | 2194 | else |
099c8b17 RH |
2195 | { |
2196 | if (lsda_encoding == DW_EH_PE_aligned) | |
2197 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE)); | |
2ad9852d RK |
2198 | dw2_asm_output_data |
2199 | (size_of_encoded_value (lsda_encoding), 0, | |
2200 | "Language Specific Data Area (none)"); | |
099c8b17 | 2201 | } |
52a11cbf RH |
2202 | } |
2203 | else | |
e1f9550a | 2204 | dw2_asm_output_data_uleb128 (0, "Augmentation size"); |
52a11cbf RH |
2205 | } |
2206 | ||
3f76745e JM |
2207 | /* Loop through the Call Frame Instructions associated with |
2208 | this FDE. */ | |
2209 | fde->dw_fde_current_label = fde->dw_fde_begin; | |
2210 | for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next) | |
12f0b96b | 2211 | output_cfi (cfi, fde, for_eh); |
3f76745e | 2212 | |
a6ab3aad | 2213 | /* Pad the FDE out to an address sized boundary. */ |
c26fbbca | 2214 | ASM_OUTPUT_ALIGN (asm_out_file, |
73c68f61 | 2215 | floor_log2 ((for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE))); |
a6ab3aad | 2216 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
3f76745e | 2217 | } |
2e4b9b8c | 2218 | |
7606e68f | 2219 | if (for_eh && targetm.terminate_dw2_eh_frame_info) |
2e4b9b8c | 2220 | dw2_asm_output_data (4, 0, "End of Table"); |
a6ab3aad JM |
2221 | #ifdef MIPS_DEBUGGING_INFO |
2222 | /* Work around Irix 6 assembler bug whereby labels at the end of a section | |
2223 | get a value of 0. Putting .align 0 after the label fixes it. */ | |
2224 | ASM_OUTPUT_ALIGN (asm_out_file, 0); | |
2225 | #endif | |
aa0c1401 JL |
2226 | |
2227 | /* Turn off app to make assembly quicker. */ | |
2228 | if (flag_debug_asm) | |
2229 | app_disable (); | |
a6ab3aad JM |
2230 | } |
2231 | ||
3f76745e JM |
2232 | /* Output a marker (i.e. a label) for the beginning of a function, before |
2233 | the prologue. */ | |
2234 | ||
2235 | void | |
7080f735 AJ |
2236 | dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED, |
2237 | const char *file ATTRIBUTE_UNUSED) | |
3f76745e JM |
2238 | { |
2239 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
b3694847 | 2240 | dw_fde_ref fde; |
3f76745e | 2241 | |
2a1ee410 RH |
2242 | current_function_func_begin_label = 0; |
2243 | ||
2244 | #ifdef IA64_UNWIND_INFO | |
2245 | /* ??? current_function_func_begin_label is also used by except.c | |
2246 | for call-site information. We must emit this label if it might | |
2247 | be used. */ | |
2248 | if ((! flag_exceptions || USING_SJLJ_EXCEPTIONS) | |
2249 | && ! dwarf2out_do_frame ()) | |
2250 | return; | |
2251 | #else | |
2252 | if (! dwarf2out_do_frame ()) | |
2253 | return; | |
2254 | #endif | |
2255 | ||
3f76745e JM |
2256 | function_section (current_function_decl); |
2257 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL, | |
df696a75 | 2258 | current_function_funcdef_no); |
2a1ee410 | 2259 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, FUNC_BEGIN_LABEL, |
df696a75 | 2260 | current_function_funcdef_no); |
00262c8a | 2261 | current_function_func_begin_label = get_identifier (label); |
3f76745e | 2262 | |
2a1ee410 RH |
2263 | #ifdef IA64_UNWIND_INFO |
2264 | /* We can elide the fde allocation if we're not emitting debug info. */ | |
2265 | if (! dwarf2out_do_frame ()) | |
2266 | return; | |
2267 | #endif | |
2268 | ||
3f76745e JM |
2269 | /* Expand the fde table if necessary. */ |
2270 | if (fde_table_in_use == fde_table_allocated) | |
2271 | { | |
2272 | fde_table_allocated += FDE_TABLE_INCREMENT; | |
17211ab5 GK |
2273 | fde_table = ggc_realloc (fde_table, |
2274 | fde_table_allocated * sizeof (dw_fde_node)); | |
2275 | memset (fde_table + fde_table_in_use, 0, | |
2276 | FDE_TABLE_INCREMENT * sizeof (dw_fde_node)); | |
a3f97cbb | 2277 | } |
3f76745e JM |
2278 | |
2279 | /* Record the FDE associated with this function. */ | |
2280 | current_funcdef_fde = fde_table_in_use; | |
2281 | ||
2282 | /* Add the new FDE at the end of the fde_table. */ | |
2283 | fde = &fde_table[fde_table_in_use++]; | |
4746cf84 | 2284 | fde->decl = current_function_decl; |
3f76745e JM |
2285 | fde->dw_fde_begin = xstrdup (label); |
2286 | fde->dw_fde_current_label = NULL; | |
2287 | fde->dw_fde_end = NULL; | |
2288 | fde->dw_fde_cfi = NULL; | |
df696a75 | 2289 | fde->funcdef_number = current_function_funcdef_no; |
fb13d4d0 | 2290 | fde->nothrow = current_function_nothrow; |
52a11cbf | 2291 | fde->uses_eh_lsda = cfun->uses_eh_lsda; |
b6128b8c | 2292 | fde->all_throwers_are_sibcalls = cfun->all_throwers_are_sibcalls; |
737faf14 | 2293 | |
b57d9225 | 2294 | args_size = old_args_size = 0; |
653e276c | 2295 | |
2ad9852d RK |
2296 | /* We only want to output line number information for the genuine dwarf2 |
2297 | prologue case, not the eh frame case. */ | |
653e276c NB |
2298 | #ifdef DWARF2_DEBUGGING_INFO |
2299 | if (file) | |
2300 | dwarf2out_source_line (line, file); | |
2301 | #endif | |
3f76745e JM |
2302 | } |
2303 | ||
2304 | /* Output a marker (i.e. a label) for the absolute end of the generated code | |
2305 | for a function definition. This gets called *after* the epilogue code has | |
2306 | been generated. */ | |
2307 | ||
2308 | void | |
7080f735 AJ |
2309 | dwarf2out_end_epilogue (unsigned int line ATTRIBUTE_UNUSED, |
2310 | const char *file ATTRIBUTE_UNUSED) | |
3f76745e JM |
2311 | { |
2312 | dw_fde_ref fde; | |
2313 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
2314 | ||
2315 | /* Output a label to mark the endpoint of the code generated for this | |
3ef42a0c | 2316 | function. */ |
df696a75 RH |
2317 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, |
2318 | current_function_funcdef_no); | |
3f76745e JM |
2319 | ASM_OUTPUT_LABEL (asm_out_file, label); |
2320 | fde = &fde_table[fde_table_in_use - 1]; | |
2321 | fde->dw_fde_end = xstrdup (label); | |
3f76745e JM |
2322 | } |
2323 | ||
2324 | void | |
7080f735 | 2325 | dwarf2out_frame_init (void) |
3f76745e JM |
2326 | { |
2327 | /* Allocate the initial hunk of the fde_table. */ | |
703ad42b | 2328 | fde_table = ggc_alloc_cleared (FDE_TABLE_INCREMENT * sizeof (dw_fde_node)); |
3f76745e JM |
2329 | fde_table_allocated = FDE_TABLE_INCREMENT; |
2330 | fde_table_in_use = 0; | |
2331 | ||
2332 | /* Generate the CFA instructions common to all FDE's. Do it now for the | |
2333 | sake of lookup_cfa. */ | |
2334 | ||
a6ab3aad | 2335 | #ifdef DWARF2_UNWIND_INFO |
91193900 AS |
2336 | /* On entry, the Canonical Frame Address is at SP. */ |
2337 | dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET); | |
2338 | initial_return_save (INCOMING_RETURN_ADDR_RTX); | |
3f76745e JM |
2339 | #endif |
2340 | } | |
2341 | ||
2342 | void | |
7080f735 | 2343 | dwarf2out_frame_finish (void) |
3f76745e | 2344 | { |
3f76745e | 2345 | /* Output call frame information. */ |
7a0c8d71 | 2346 | if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) |
3f76745e | 2347 | output_call_frame_info (0); |
2ad9852d | 2348 | |
ddee9e8d | 2349 | if (! USING_SJLJ_EXCEPTIONS && (flag_unwind_tables || flag_exceptions)) |
3f76745e | 2350 | output_call_frame_info (1); |
556273e0 | 2351 | } |
17211ab5 | 2352 | #endif |
7d9d8943 AM |
2353 | \f |
2354 | /* And now, the subset of the debugging information support code necessary | |
2355 | for emitting location expressions. */ | |
3f76745e | 2356 | |
b9203463 RH |
2357 | /* We need some way to distinguish DW_OP_addr with a direct symbol |
2358 | relocation from DW_OP_addr with a dtp-relative symbol relocation. */ | |
2359 | #define INTERNAL_DW_OP_tls_addr (0x100 + DW_OP_addr) | |
2360 | ||
2361 | ||
7d9d8943 AM |
2362 | typedef struct dw_val_struct *dw_val_ref; |
2363 | typedef struct die_struct *dw_die_ref; | |
2364 | typedef struct dw_loc_descr_struct *dw_loc_descr_ref; | |
63e46568 | 2365 | typedef struct dw_loc_list_struct *dw_loc_list_ref; |
3f76745e JM |
2366 | |
2367 | /* Each DIE may have a series of attribute/value pairs. Values | |
2368 | can take on several forms. The forms that are used in this | |
2369 | implementation are listed below. */ | |
2370 | ||
17211ab5 | 2371 | enum dw_val_class |
3f76745e JM |
2372 | { |
2373 | dw_val_class_addr, | |
a20612aa | 2374 | dw_val_class_offset, |
3f76745e | 2375 | dw_val_class_loc, |
63e46568 | 2376 | dw_val_class_loc_list, |
2bee6045 | 2377 | dw_val_class_range_list, |
3f76745e JM |
2378 | dw_val_class_const, |
2379 | dw_val_class_unsigned_const, | |
2380 | dw_val_class_long_long, | |
e7ee3914 | 2381 | dw_val_class_vec, |
3f76745e JM |
2382 | dw_val_class_flag, |
2383 | dw_val_class_die_ref, | |
2384 | dw_val_class_fde_ref, | |
2385 | dw_val_class_lbl_id, | |
8b790721 | 2386 | dw_val_class_lbl_offset, |
3f76745e | 2387 | dw_val_class_str |
17211ab5 | 2388 | }; |
a3f97cbb | 2389 | |
3f76745e | 2390 | /* Describe a double word constant value. */ |
21217bd0 | 2391 | /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */ |
3f76745e | 2392 | |
17211ab5 | 2393 | typedef struct dw_long_long_struct GTY(()) |
a3f97cbb | 2394 | { |
3f76745e JM |
2395 | unsigned long hi; |
2396 | unsigned long low; | |
2397 | } | |
2398 | dw_long_long_const; | |
2399 | ||
e7ee3914 | 2400 | /* Describe a floating point constant value, or a vector constant value. */ |
3f76745e | 2401 | |
e7ee3914 | 2402 | typedef struct dw_vec_struct GTY(()) |
3f76745e | 2403 | { |
e7ee3914 | 2404 | unsigned char * GTY((length ("%h.length"))) array; |
3f76745e | 2405 | unsigned length; |
e7ee3914 | 2406 | unsigned elt_size; |
3f76745e | 2407 | } |
e7ee3914 | 2408 | dw_vec_const; |
3f76745e | 2409 | |
956d6950 | 2410 | /* The dw_val_node describes an attribute's value, as it is |
3f76745e JM |
2411 | represented internally. */ |
2412 | ||
17211ab5 | 2413 | typedef struct dw_val_struct GTY(()) |
3f76745e | 2414 | { |
17211ab5 GK |
2415 | enum dw_val_class val_class; |
2416 | union dw_val_struct_union | |
a3f97cbb | 2417 | { |
17211ab5 | 2418 | rtx GTY ((tag ("dw_val_class_addr"))) val_addr; |
799f628a | 2419 | unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_offset"))) val_offset; |
17211ab5 GK |
2420 | dw_loc_list_ref GTY ((tag ("dw_val_class_loc_list"))) val_loc_list; |
2421 | dw_loc_descr_ref GTY ((tag ("dw_val_class_loc"))) val_loc; | |
1431042e | 2422 | HOST_WIDE_INT GTY ((default)) val_int; |
799f628a | 2423 | unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_unsigned_const"))) val_unsigned; |
17211ab5 | 2424 | dw_long_long_const GTY ((tag ("dw_val_class_long_long"))) val_long_long; |
e7ee3914 | 2425 | dw_vec_const GTY ((tag ("dw_val_class_vec"))) val_vec; |
17211ab5 | 2426 | struct dw_val_die_union |
2ad9852d RK |
2427 | { |
2428 | dw_die_ref die; | |
2429 | int external; | |
17211ab5 GK |
2430 | } GTY ((tag ("dw_val_class_die_ref"))) val_die_ref; |
2431 | unsigned GTY ((tag ("dw_val_class_fde_ref"))) val_fde_index; | |
2432 | struct indirect_string_node * GTY ((tag ("dw_val_class_str"))) val_str; | |
2433 | char * GTY ((tag ("dw_val_class_lbl_id"))) val_lbl_id; | |
2434 | unsigned char GTY ((tag ("dw_val_class_flag"))) val_flag; | |
a3f97cbb | 2435 | } |
17211ab5 | 2436 | GTY ((desc ("%1.val_class"))) v; |
3f76745e JM |
2437 | } |
2438 | dw_val_node; | |
2439 | ||
2440 | /* Locations in memory are described using a sequence of stack machine | |
2441 | operations. */ | |
2442 | ||
17211ab5 | 2443 | typedef struct dw_loc_descr_struct GTY(()) |
3f76745e JM |
2444 | { |
2445 | dw_loc_descr_ref dw_loc_next; | |
2446 | enum dwarf_location_atom dw_loc_opc; | |
2447 | dw_val_node dw_loc_oprnd1; | |
2448 | dw_val_node dw_loc_oprnd2; | |
d8041cc8 | 2449 | int dw_loc_addr; |
3f76745e JM |
2450 | } |
2451 | dw_loc_descr_node; | |
2452 | ||
63e46568 DB |
2453 | /* Location lists are ranges + location descriptions for that range, |
2454 | so you can track variables that are in different places over | |
30f7a378 | 2455 | their entire life. */ |
17211ab5 | 2456 | typedef struct dw_loc_list_struct GTY(()) |
63e46568 DB |
2457 | { |
2458 | dw_loc_list_ref dw_loc_next; | |
2459 | const char *begin; /* Label for begin address of range */ | |
2460 | const char *end; /* Label for end address of range */ | |
2ad9852d RK |
2461 | char *ll_symbol; /* Label for beginning of location list. |
2462 | Only on head of list */ | |
63e46568 DB |
2463 | const char *section; /* Section this loclist is relative to */ |
2464 | dw_loc_descr_ref expr; | |
2465 | } dw_loc_list_node; | |
2466 | ||
17211ab5 GK |
2467 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
2468 | ||
7080f735 AJ |
2469 | static const char *dwarf_stack_op_name (unsigned); |
2470 | static dw_loc_descr_ref new_loc_descr (enum dwarf_location_atom, | |
799f628a | 2471 | unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT); |
7080f735 AJ |
2472 | static void add_loc_descr (dw_loc_descr_ref *, dw_loc_descr_ref); |
2473 | static unsigned long size_of_loc_descr (dw_loc_descr_ref); | |
2474 | static unsigned long size_of_locs (dw_loc_descr_ref); | |
2475 | static void output_loc_operands (dw_loc_descr_ref); | |
2476 | static void output_loc_sequence (dw_loc_descr_ref); | |
3f76745e | 2477 | |
7d9d8943 | 2478 | /* Convert a DWARF stack opcode into its string name. */ |
3f76745e | 2479 | |
7d9d8943 | 2480 | static const char * |
7080f735 | 2481 | dwarf_stack_op_name (unsigned int op) |
ef76d03b | 2482 | { |
7d9d8943 AM |
2483 | switch (op) |
2484 | { | |
2485 | case DW_OP_addr: | |
b9203463 | 2486 | case INTERNAL_DW_OP_tls_addr: |
7d9d8943 AM |
2487 | return "DW_OP_addr"; |
2488 | case DW_OP_deref: | |
2489 | return "DW_OP_deref"; | |
2490 | case DW_OP_const1u: | |
2491 | return "DW_OP_const1u"; | |
2492 | case DW_OP_const1s: | |
2493 | return "DW_OP_const1s"; | |
2494 | case DW_OP_const2u: | |
2495 | return "DW_OP_const2u"; | |
2496 | case DW_OP_const2s: | |
2497 | return "DW_OP_const2s"; | |
2498 | case DW_OP_const4u: | |
2499 | return "DW_OP_const4u"; | |
2500 | case DW_OP_const4s: | |
2501 | return "DW_OP_const4s"; | |
2502 | case DW_OP_const8u: | |
2503 | return "DW_OP_const8u"; | |
2504 | case DW_OP_const8s: | |
2505 | return "DW_OP_const8s"; | |
2506 | case DW_OP_constu: | |
2507 | return "DW_OP_constu"; | |
2508 | case DW_OP_consts: | |
2509 | return "DW_OP_consts"; | |
2510 | case DW_OP_dup: | |
2511 | return "DW_OP_dup"; | |
2512 | case DW_OP_drop: | |
2513 | return "DW_OP_drop"; | |
2514 | case DW_OP_over: | |
2515 | return "DW_OP_over"; | |
2516 | case DW_OP_pick: | |
2517 | return "DW_OP_pick"; | |
2518 | case DW_OP_swap: | |
2519 | return "DW_OP_swap"; | |
2520 | case DW_OP_rot: | |
2521 | return "DW_OP_rot"; | |
2522 | case DW_OP_xderef: | |
2523 | return "DW_OP_xderef"; | |
2524 | case DW_OP_abs: | |
2525 | return "DW_OP_abs"; | |
2526 | case DW_OP_and: | |
2527 | return "DW_OP_and"; | |
2528 | case DW_OP_div: | |
2529 | return "DW_OP_div"; | |
2530 | case DW_OP_minus: | |
2531 | return "DW_OP_minus"; | |
2532 | case DW_OP_mod: | |
2533 | return "DW_OP_mod"; | |
2534 | case DW_OP_mul: | |
2535 | return "DW_OP_mul"; | |
2536 | case DW_OP_neg: | |
2537 | return "DW_OP_neg"; | |
2538 | case DW_OP_not: | |
2539 | return "DW_OP_not"; | |
2540 | case DW_OP_or: | |
2541 | return "DW_OP_or"; | |
2542 | case DW_OP_plus: | |
2543 | return "DW_OP_plus"; | |
2544 | case DW_OP_plus_uconst: | |
2545 | return "DW_OP_plus_uconst"; | |
2546 | case DW_OP_shl: | |
2547 | return "DW_OP_shl"; | |
2548 | case DW_OP_shr: | |
2549 | return "DW_OP_shr"; | |
2550 | case DW_OP_shra: | |
2551 | return "DW_OP_shra"; | |
2552 | case DW_OP_xor: | |
2553 | return "DW_OP_xor"; | |
2554 | case DW_OP_bra: | |
2555 | return "DW_OP_bra"; | |
2556 | case DW_OP_eq: | |
2557 | return "DW_OP_eq"; | |
2558 | case DW_OP_ge: | |
2559 | return "DW_OP_ge"; | |
2560 | case DW_OP_gt: | |
2561 | return "DW_OP_gt"; | |
2562 | case DW_OP_le: | |
2563 | return "DW_OP_le"; | |
2564 | case DW_OP_lt: | |
2565 | return "DW_OP_lt"; | |
2566 | case DW_OP_ne: | |
2567 | return "DW_OP_ne"; | |
2568 | case DW_OP_skip: | |
2569 | return "DW_OP_skip"; | |
2570 | case DW_OP_lit0: | |
2571 | return "DW_OP_lit0"; | |
2572 | case DW_OP_lit1: | |
2573 | return "DW_OP_lit1"; | |
2574 | case DW_OP_lit2: | |
2575 | return "DW_OP_lit2"; | |
2576 | case DW_OP_lit3: | |
2577 | return "DW_OP_lit3"; | |
2578 | case DW_OP_lit4: | |
2579 | return "DW_OP_lit4"; | |
2580 | case DW_OP_lit5: | |
2581 | return "DW_OP_lit5"; | |
2582 | case DW_OP_lit6: | |
2583 | return "DW_OP_lit6"; | |
2584 | case DW_OP_lit7: | |
2585 | return "DW_OP_lit7"; | |
2586 | case DW_OP_lit8: | |
2587 | return "DW_OP_lit8"; | |
2588 | case DW_OP_lit9: | |
2589 | return "DW_OP_lit9"; | |
2590 | case DW_OP_lit10: | |
2591 | return "DW_OP_lit10"; | |
2592 | case DW_OP_lit11: | |
2593 | return "DW_OP_lit11"; | |
2594 | case DW_OP_lit12: | |
2595 | return "DW_OP_lit12"; | |
2596 | case DW_OP_lit13: | |
2597 | return "DW_OP_lit13"; | |
2598 | case DW_OP_lit14: | |
2599 | return "DW_OP_lit14"; | |
2600 | case DW_OP_lit15: | |
2601 | return "DW_OP_lit15"; | |
2602 | case DW_OP_lit16: | |
2603 | return "DW_OP_lit16"; | |
2604 | case DW_OP_lit17: | |
2605 | return "DW_OP_lit17"; | |
2606 | case DW_OP_lit18: | |
2607 | return "DW_OP_lit18"; | |
2608 | case DW_OP_lit19: | |
2609 | return "DW_OP_lit19"; | |
2610 | case DW_OP_lit20: | |
2611 | return "DW_OP_lit20"; | |
2612 | case DW_OP_lit21: | |
2613 | return "DW_OP_lit21"; | |
2614 | case DW_OP_lit22: | |
2615 | return "DW_OP_lit22"; | |
2616 | case DW_OP_lit23: | |
2617 | return "DW_OP_lit23"; | |
2618 | case DW_OP_lit24: | |
2619 | return "DW_OP_lit24"; | |
2620 | case DW_OP_lit25: | |
2621 | return "DW_OP_lit25"; | |
2622 | case DW_OP_lit26: | |
2623 | return "DW_OP_lit26"; | |
2624 | case DW_OP_lit27: | |
2625 | return "DW_OP_lit27"; | |
2626 | case DW_OP_lit28: | |
2627 | return "DW_OP_lit28"; | |
2628 | case DW_OP_lit29: | |
2629 | return "DW_OP_lit29"; | |
2630 | case DW_OP_lit30: | |
2631 | return "DW_OP_lit30"; | |
2632 | case DW_OP_lit31: | |
2633 | return "DW_OP_lit31"; | |
2634 | case DW_OP_reg0: | |
2635 | return "DW_OP_reg0"; | |
2636 | case DW_OP_reg1: | |
2637 | return "DW_OP_reg1"; | |
2638 | case DW_OP_reg2: | |
2639 | return "DW_OP_reg2"; | |
2640 | case DW_OP_reg3: | |
2641 | return "DW_OP_reg3"; | |
2642 | case DW_OP_reg4: | |
2643 | return "DW_OP_reg4"; | |
2644 | case DW_OP_reg5: | |
2645 | return "DW_OP_reg5"; | |
2646 | case DW_OP_reg6: | |
2647 | return "DW_OP_reg6"; | |
2648 | case DW_OP_reg7: | |
2649 | return "DW_OP_reg7"; | |
2650 | case DW_OP_reg8: | |
2651 | return "DW_OP_reg8"; | |
2652 | case DW_OP_reg9: | |
2653 | return "DW_OP_reg9"; | |
2654 | case DW_OP_reg10: | |
2655 | return "DW_OP_reg10"; | |
2656 | case DW_OP_reg11: | |
2657 | return "DW_OP_reg11"; | |
2658 | case DW_OP_reg12: | |
2659 | return "DW_OP_reg12"; | |
2660 | case DW_OP_reg13: | |
2661 | return "DW_OP_reg13"; | |
2662 | case DW_OP_reg14: | |
2663 | return "DW_OP_reg14"; | |
2664 | case DW_OP_reg15: | |
2665 | return "DW_OP_reg15"; | |
2666 | case DW_OP_reg16: | |
2667 | return "DW_OP_reg16"; | |
2668 | case DW_OP_reg17: | |
2669 | return "DW_OP_reg17"; | |
2670 | case DW_OP_reg18: | |
2671 | return "DW_OP_reg18"; | |
2672 | case DW_OP_reg19: | |
2673 | return "DW_OP_reg19"; | |
2674 | case DW_OP_reg20: | |
2675 | return "DW_OP_reg20"; | |
2676 | case DW_OP_reg21: | |
2677 | return "DW_OP_reg21"; | |
2678 | case DW_OP_reg22: | |
2679 | return "DW_OP_reg22"; | |
2680 | case DW_OP_reg23: | |
2681 | return "DW_OP_reg23"; | |
2682 | case DW_OP_reg24: | |
2683 | return "DW_OP_reg24"; | |
2684 | case DW_OP_reg25: | |
2685 | return "DW_OP_reg25"; | |
2686 | case DW_OP_reg26: | |
2687 | return "DW_OP_reg26"; | |
2688 | case DW_OP_reg27: | |
2689 | return "DW_OP_reg27"; | |
2690 | case DW_OP_reg28: | |
2691 | return "DW_OP_reg28"; | |
2692 | case DW_OP_reg29: | |
2693 | return "DW_OP_reg29"; | |
2694 | case DW_OP_reg30: | |
2695 | return "DW_OP_reg30"; | |
2696 | case DW_OP_reg31: | |
2697 | return "DW_OP_reg31"; | |
2698 | case DW_OP_breg0: | |
2699 | return "DW_OP_breg0"; | |
2700 | case DW_OP_breg1: | |
2701 | return "DW_OP_breg1"; | |
2702 | case DW_OP_breg2: | |
2703 | return "DW_OP_breg2"; | |
2704 | case DW_OP_breg3: | |
2705 | return "DW_OP_breg3"; | |
2706 | case DW_OP_breg4: | |
2707 | return "DW_OP_breg4"; | |
2708 | case DW_OP_breg5: | |
2709 | return "DW_OP_breg5"; | |
2710 | case DW_OP_breg6: | |
2711 | return "DW_OP_breg6"; | |
2712 | case DW_OP_breg7: | |
2713 | return "DW_OP_breg7"; | |
2714 | case DW_OP_breg8: | |
2715 | return "DW_OP_breg8"; | |
2716 | case DW_OP_breg9: | |
2717 | return "DW_OP_breg9"; | |
2718 | case DW_OP_breg10: | |
2719 | return "DW_OP_breg10"; | |
2720 | case DW_OP_breg11: | |
2721 | return "DW_OP_breg11"; | |
2722 | case DW_OP_breg12: | |
2723 | return "DW_OP_breg12"; | |
2724 | case DW_OP_breg13: | |
2725 | return "DW_OP_breg13"; | |
2726 | case DW_OP_breg14: | |
2727 | return "DW_OP_breg14"; | |
2728 | case DW_OP_breg15: | |
2729 | return "DW_OP_breg15"; | |
2730 | case DW_OP_breg16: | |
2731 | return "DW_OP_breg16"; | |
2732 | case DW_OP_breg17: | |
2733 | return "DW_OP_breg17"; | |
2734 | case DW_OP_breg18: | |
2735 | return "DW_OP_breg18"; | |
2736 | case DW_OP_breg19: | |
2737 | return "DW_OP_breg19"; | |
2738 | case DW_OP_breg20: | |
2739 | return "DW_OP_breg20"; | |
2740 | case DW_OP_breg21: | |
2741 | return "DW_OP_breg21"; | |
2742 | case DW_OP_breg22: | |
2743 | return "DW_OP_breg22"; | |
2744 | case DW_OP_breg23: | |
2745 | return "DW_OP_breg23"; | |
2746 | case DW_OP_breg24: | |
2747 | return "DW_OP_breg24"; | |
2748 | case DW_OP_breg25: | |
2749 | return "DW_OP_breg25"; | |
2750 | case DW_OP_breg26: | |
2751 | return "DW_OP_breg26"; | |
2752 | case DW_OP_breg27: | |
2753 | return "DW_OP_breg27"; | |
2754 | case DW_OP_breg28: | |
2755 | return "DW_OP_breg28"; | |
2756 | case DW_OP_breg29: | |
2757 | return "DW_OP_breg29"; | |
2758 | case DW_OP_breg30: | |
2759 | return "DW_OP_breg30"; | |
2760 | case DW_OP_breg31: | |
2761 | return "DW_OP_breg31"; | |
2762 | case DW_OP_regx: | |
2763 | return "DW_OP_regx"; | |
2764 | case DW_OP_fbreg: | |
2765 | return "DW_OP_fbreg"; | |
2766 | case DW_OP_bregx: | |
2767 | return "DW_OP_bregx"; | |
2768 | case DW_OP_piece: | |
2769 | return "DW_OP_piece"; | |
2770 | case DW_OP_deref_size: | |
2771 | return "DW_OP_deref_size"; | |
2772 | case DW_OP_xderef_size: | |
2773 | return "DW_OP_xderef_size"; | |
2774 | case DW_OP_nop: | |
2775 | return "DW_OP_nop"; | |
b9203463 RH |
2776 | case DW_OP_push_object_address: |
2777 | return "DW_OP_push_object_address"; | |
2778 | case DW_OP_call2: | |
2779 | return "DW_OP_call2"; | |
2780 | case DW_OP_call4: | |
2781 | return "DW_OP_call4"; | |
2782 | case DW_OP_call_ref: | |
2783 | return "DW_OP_call_ref"; | |
2784 | case DW_OP_GNU_push_tls_address: | |
2785 | return "DW_OP_GNU_push_tls_address"; | |
3f76745e | 2786 | default: |
7d9d8943 | 2787 | return "OP_<unknown>"; |
3f76745e | 2788 | } |
bdb669cb | 2789 | } |
a3f97cbb | 2790 | |
7d9d8943 AM |
2791 | /* Return a pointer to a newly allocated location description. Location |
2792 | descriptions are simple expression terms that can be strung | |
2793 | together to form more complicated location (address) descriptions. */ | |
2794 | ||
2795 | static inline dw_loc_descr_ref | |
799f628a JH |
2796 | new_loc_descr (enum dwarf_location_atom op, unsigned HOST_WIDE_INT oprnd1, |
2797 | unsigned HOST_WIDE_INT oprnd2) | |
4b674448 | 2798 | { |
703ad42b | 2799 | dw_loc_descr_ref descr = ggc_alloc_cleared (sizeof (dw_loc_descr_node)); |
71dfc51f | 2800 | |
7d9d8943 AM |
2801 | descr->dw_loc_opc = op; |
2802 | descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const; | |
2803 | descr->dw_loc_oprnd1.v.val_unsigned = oprnd1; | |
2804 | descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const; | |
2805 | descr->dw_loc_oprnd2.v.val_unsigned = oprnd2; | |
71dfc51f | 2806 | |
7d9d8943 AM |
2807 | return descr; |
2808 | } | |
2809 | ||
63e46568 | 2810 | |
7d9d8943 AM |
2811 | /* Add a location description term to a location description expression. */ |
2812 | ||
2813 | static inline void | |
7080f735 | 2814 | add_loc_descr (dw_loc_descr_ref *list_head, dw_loc_descr_ref descr) |
7d9d8943 | 2815 | { |
b3694847 | 2816 | dw_loc_descr_ref *d; |
7d9d8943 AM |
2817 | |
2818 | /* Find the end of the chain. */ | |
2819 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) | |
2820 | ; | |
2821 | ||
2822 | *d = descr; | |
2823 | } | |
2824 | ||
2825 | /* Return the size of a location descriptor. */ | |
2826 | ||
2827 | static unsigned long | |
7080f735 | 2828 | size_of_loc_descr (dw_loc_descr_ref loc) |
7d9d8943 | 2829 | { |
b3694847 | 2830 | unsigned long size = 1; |
7d9d8943 AM |
2831 | |
2832 | switch (loc->dw_loc_opc) | |
2833 | { | |
2834 | case DW_OP_addr: | |
b9203463 | 2835 | case INTERNAL_DW_OP_tls_addr: |
7d9d8943 AM |
2836 | size += DWARF2_ADDR_SIZE; |
2837 | break; | |
2838 | case DW_OP_const1u: | |
2839 | case DW_OP_const1s: | |
2840 | size += 1; | |
2841 | break; | |
2842 | case DW_OP_const2u: | |
2843 | case DW_OP_const2s: | |
2844 | size += 2; | |
2845 | break; | |
2846 | case DW_OP_const4u: | |
2847 | case DW_OP_const4s: | |
2848 | size += 4; | |
2849 | break; | |
2850 | case DW_OP_const8u: | |
2851 | case DW_OP_const8s: | |
2852 | size += 8; | |
2853 | break; | |
2854 | case DW_OP_constu: | |
2855 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2856 | break; | |
2857 | case DW_OP_consts: | |
2858 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
2859 | break; | |
2860 | case DW_OP_pick: | |
2861 | size += 1; | |
2862 | break; | |
2863 | case DW_OP_plus_uconst: | |
2864 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2865 | break; | |
2866 | case DW_OP_skip: | |
2867 | case DW_OP_bra: | |
2868 | size += 2; | |
2869 | break; | |
2870 | case DW_OP_breg0: | |
2871 | case DW_OP_breg1: | |
2872 | case DW_OP_breg2: | |
2873 | case DW_OP_breg3: | |
2874 | case DW_OP_breg4: | |
2875 | case DW_OP_breg5: | |
2876 | case DW_OP_breg6: | |
2877 | case DW_OP_breg7: | |
2878 | case DW_OP_breg8: | |
2879 | case DW_OP_breg9: | |
2880 | case DW_OP_breg10: | |
2881 | case DW_OP_breg11: | |
2882 | case DW_OP_breg12: | |
2883 | case DW_OP_breg13: | |
2884 | case DW_OP_breg14: | |
2885 | case DW_OP_breg15: | |
2886 | case DW_OP_breg16: | |
2887 | case DW_OP_breg17: | |
2888 | case DW_OP_breg18: | |
2889 | case DW_OP_breg19: | |
2890 | case DW_OP_breg20: | |
2891 | case DW_OP_breg21: | |
2892 | case DW_OP_breg22: | |
2893 | case DW_OP_breg23: | |
2894 | case DW_OP_breg24: | |
2895 | case DW_OP_breg25: | |
2896 | case DW_OP_breg26: | |
2897 | case DW_OP_breg27: | |
2898 | case DW_OP_breg28: | |
2899 | case DW_OP_breg29: | |
2900 | case DW_OP_breg30: | |
2901 | case DW_OP_breg31: | |
2902 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
2903 | break; | |
2904 | case DW_OP_regx: | |
2905 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2906 | break; | |
2907 | case DW_OP_fbreg: | |
2908 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
2909 | break; | |
2910 | case DW_OP_bregx: | |
2911 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2912 | size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int); | |
2913 | break; | |
2914 | case DW_OP_piece: | |
2915 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2916 | break; | |
2917 | case DW_OP_deref_size: | |
2918 | case DW_OP_xderef_size: | |
2919 | size += 1; | |
2920 | break; | |
b9203463 RH |
2921 | case DW_OP_call2: |
2922 | size += 2; | |
2923 | break; | |
2924 | case DW_OP_call4: | |
2925 | size += 4; | |
2926 | break; | |
2927 | case DW_OP_call_ref: | |
2928 | size += DWARF2_ADDR_SIZE; | |
2929 | break; | |
3f76745e | 2930 | default: |
7d9d8943 | 2931 | break; |
4b674448 | 2932 | } |
7d9d8943 AM |
2933 | |
2934 | return size; | |
4b674448 JM |
2935 | } |
2936 | ||
7d9d8943 | 2937 | /* Return the size of a series of location descriptors. */ |
71dfc51f | 2938 | |
7d9d8943 | 2939 | static unsigned long |
7080f735 | 2940 | size_of_locs (dw_loc_descr_ref loc) |
4b674448 | 2941 | { |
2ad9852d | 2942 | unsigned long size; |
7d9d8943 | 2943 | |
2ad9852d | 2944 | for (size = 0; loc != NULL; loc = loc->dw_loc_next) |
d8041cc8 RH |
2945 | { |
2946 | loc->dw_loc_addr = size; | |
2947 | size += size_of_loc_descr (loc); | |
2948 | } | |
7d9d8943 AM |
2949 | |
2950 | return size; | |
4b674448 JM |
2951 | } |
2952 | ||
7d9d8943 | 2953 | /* Output location description stack opcode's operands (if any). */ |
71dfc51f | 2954 | |
7d9d8943 | 2955 | static void |
7080f735 | 2956 | output_loc_operands (dw_loc_descr_ref loc) |
a3f97cbb | 2957 | { |
b3694847 SS |
2958 | dw_val_ref val1 = &loc->dw_loc_oprnd1; |
2959 | dw_val_ref val2 = &loc->dw_loc_oprnd2; | |
7d9d8943 AM |
2960 | |
2961 | switch (loc->dw_loc_opc) | |
a3f97cbb | 2962 | { |
0517872a | 2963 | #ifdef DWARF2_DEBUGGING_INFO |
3f76745e | 2964 | case DW_OP_addr: |
2e4b9b8c | 2965 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, val1->v.val_addr, NULL); |
7d9d8943 | 2966 | break; |
3f76745e | 2967 | case DW_OP_const2u: |
3f76745e | 2968 | case DW_OP_const2s: |
2e4b9b8c | 2969 | dw2_asm_output_data (2, val1->v.val_int, NULL); |
7d9d8943 | 2970 | break; |
3f76745e | 2971 | case DW_OP_const4u: |
3f76745e | 2972 | case DW_OP_const4s: |
2e4b9b8c | 2973 | dw2_asm_output_data (4, val1->v.val_int, NULL); |
7d9d8943 | 2974 | break; |
3f76745e | 2975 | case DW_OP_const8u: |
3f76745e | 2976 | case DW_OP_const8s: |
2e4b9b8c RH |
2977 | if (HOST_BITS_PER_LONG < 64) |
2978 | abort (); | |
2979 | dw2_asm_output_data (8, val1->v.val_int, NULL); | |
7d9d8943 | 2980 | break; |
0517872a JM |
2981 | case DW_OP_skip: |
2982 | case DW_OP_bra: | |
d8041cc8 RH |
2983 | { |
2984 | int offset; | |
2985 | ||
2986 | if (val1->val_class == dw_val_class_loc) | |
2987 | offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3); | |
2988 | else | |
2989 | abort (); | |
2990 | ||
2e4b9b8c | 2991 | dw2_asm_output_data (2, offset, NULL); |
d8041cc8 | 2992 | } |
0517872a | 2993 | break; |
3139472f JM |
2994 | #else |
2995 | case DW_OP_addr: | |
2996 | case DW_OP_const2u: | |
2997 | case DW_OP_const2s: | |
2998 | case DW_OP_const4u: | |
2999 | case DW_OP_const4s: | |
3000 | case DW_OP_const8u: | |
3001 | case DW_OP_const8s: | |
3002 | case DW_OP_skip: | |
3003 | case DW_OP_bra: | |
3004 | /* We currently don't make any attempt to make sure these are | |
73c68f61 SS |
3005 | aligned properly like we do for the main unwind info, so |
3006 | don't support emitting things larger than a byte if we're | |
3007 | only doing unwinding. */ | |
3139472f | 3008 | abort (); |
0517872a JM |
3009 | #endif |
3010 | case DW_OP_const1u: | |
3011 | case DW_OP_const1s: | |
2e4b9b8c | 3012 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
0517872a | 3013 | break; |
3f76745e | 3014 | case DW_OP_constu: |
2e4b9b8c | 3015 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3016 | break; |
3f76745e | 3017 | case DW_OP_consts: |
2e4b9b8c | 3018 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 AM |
3019 | break; |
3020 | case DW_OP_pick: | |
2e4b9b8c | 3021 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
7d9d8943 AM |
3022 | break; |
3023 | case DW_OP_plus_uconst: | |
2e4b9b8c | 3024 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3025 | break; |
3f76745e | 3026 | case DW_OP_breg0: |
3f76745e | 3027 | case DW_OP_breg1: |
3f76745e | 3028 | case DW_OP_breg2: |
3f76745e | 3029 | case DW_OP_breg3: |
3f76745e | 3030 | case DW_OP_breg4: |
3f76745e | 3031 | case DW_OP_breg5: |
3f76745e | 3032 | case DW_OP_breg6: |
3f76745e | 3033 | case DW_OP_breg7: |
3f76745e | 3034 | case DW_OP_breg8: |
3f76745e | 3035 | case DW_OP_breg9: |
3f76745e | 3036 | case DW_OP_breg10: |
3f76745e | 3037 | case DW_OP_breg11: |
3f76745e | 3038 | case DW_OP_breg12: |
3f76745e | 3039 | case DW_OP_breg13: |
3f76745e | 3040 | case DW_OP_breg14: |
3f76745e | 3041 | case DW_OP_breg15: |
3f76745e | 3042 | case DW_OP_breg16: |
3f76745e | 3043 | case DW_OP_breg17: |
3f76745e | 3044 | case DW_OP_breg18: |
3f76745e | 3045 | case DW_OP_breg19: |
3f76745e | 3046 | case DW_OP_breg20: |
3f76745e | 3047 | case DW_OP_breg21: |
3f76745e | 3048 | case DW_OP_breg22: |
3f76745e | 3049 | case DW_OP_breg23: |
3f76745e | 3050 | case DW_OP_breg24: |
3f76745e | 3051 | case DW_OP_breg25: |
3f76745e | 3052 | case DW_OP_breg26: |
3f76745e | 3053 | case DW_OP_breg27: |
3f76745e | 3054 | case DW_OP_breg28: |
3f76745e | 3055 | case DW_OP_breg29: |
3f76745e | 3056 | case DW_OP_breg30: |
3f76745e | 3057 | case DW_OP_breg31: |
2e4b9b8c | 3058 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 | 3059 | break; |
3f76745e | 3060 | case DW_OP_regx: |
2e4b9b8c | 3061 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3062 | break; |
3f76745e | 3063 | case DW_OP_fbreg: |
2e4b9b8c | 3064 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 | 3065 | break; |
3f76745e | 3066 | case DW_OP_bregx: |
2e4b9b8c RH |
3067 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
3068 | dw2_asm_output_data_sleb128 (val2->v.val_int, NULL); | |
7d9d8943 | 3069 | break; |
3f76745e | 3070 | case DW_OP_piece: |
2e4b9b8c | 3071 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3072 | break; |
3f76745e | 3073 | case DW_OP_deref_size: |
3f76745e | 3074 | case DW_OP_xderef_size: |
2e4b9b8c | 3075 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
7d9d8943 | 3076 | break; |
b9203463 RH |
3077 | |
3078 | case INTERNAL_DW_OP_tls_addr: | |
3079 | #ifdef ASM_OUTPUT_DWARF_DTPREL | |
3080 | ASM_OUTPUT_DWARF_DTPREL (asm_out_file, DWARF2_ADDR_SIZE, | |
3081 | val1->v.val_addr); | |
3082 | fputc ('\n', asm_out_file); | |
3083 | #else | |
3084 | abort (); | |
3085 | #endif | |
3086 | break; | |
3087 | ||
7d9d8943 | 3088 | default: |
3139472f JM |
3089 | /* Other codes have no operands. */ |
3090 | break; | |
7d9d8943 AM |
3091 | } |
3092 | } | |
3093 | ||
3094 | /* Output a sequence of location operations. */ | |
3095 | ||
3096 | static void | |
7080f735 | 3097 | output_loc_sequence (dw_loc_descr_ref loc) |
7d9d8943 AM |
3098 | { |
3099 | for (; loc != NULL; loc = loc->dw_loc_next) | |
3100 | { | |
3101 | /* Output the opcode. */ | |
2e4b9b8c RH |
3102 | dw2_asm_output_data (1, loc->dw_loc_opc, |
3103 | "%s", dwarf_stack_op_name (loc->dw_loc_opc)); | |
7d9d8943 AM |
3104 | |
3105 | /* Output the operand(s) (if any). */ | |
3106 | output_loc_operands (loc); | |
3107 | } | |
3108 | } | |
3109 | ||
3110 | /* This routine will generate the correct assembly data for a location | |
3111 | description based on a cfi entry with a complex address. */ | |
3112 | ||
3113 | static void | |
7080f735 | 3114 | output_cfa_loc (dw_cfi_ref cfi) |
7d9d8943 AM |
3115 | { |
3116 | dw_loc_descr_ref loc; | |
3117 | unsigned long size; | |
3118 | ||
3119 | /* Output the size of the block. */ | |
3120 | loc = cfi->dw_cfi_oprnd1.dw_cfi_loc; | |
3121 | size = size_of_locs (loc); | |
2e4b9b8c | 3122 | dw2_asm_output_data_uleb128 (size, NULL); |
7d9d8943 AM |
3123 | |
3124 | /* Now output the operations themselves. */ | |
3125 | output_loc_sequence (loc); | |
3126 | } | |
3127 | ||
dd49a9ec | 3128 | /* This function builds a dwarf location descriptor sequence from |
556273e0 | 3129 | a dw_cfa_location. */ |
7d9d8943 AM |
3130 | |
3131 | static struct dw_loc_descr_struct * | |
7080f735 | 3132 | build_cfa_loc (dw_cfa_location *cfa) |
7d9d8943 AM |
3133 | { |
3134 | struct dw_loc_descr_struct *head, *tmp; | |
3135 | ||
3136 | if (cfa->indirect == 0) | |
3137 | abort (); | |
3138 | ||
3139 | if (cfa->base_offset) | |
f299afab HPN |
3140 | { |
3141 | if (cfa->reg <= 31) | |
3142 | head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0); | |
3143 | else | |
3144 | head = new_loc_descr (DW_OP_bregx, cfa->reg, cfa->base_offset); | |
3145 | } | |
3146 | else if (cfa->reg <= 31) | |
7d9d8943 | 3147 | head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0); |
f299afab HPN |
3148 | else |
3149 | head = new_loc_descr (DW_OP_regx, cfa->reg, 0); | |
2ad9852d | 3150 | |
7d9d8943 AM |
3151 | head->dw_loc_oprnd1.val_class = dw_val_class_const; |
3152 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
3153 | add_loc_descr (&head, tmp); | |
3154 | if (cfa->offset != 0) | |
3155 | { | |
3156 | tmp = new_loc_descr (DW_OP_plus_uconst, cfa->offset, 0); | |
3157 | add_loc_descr (&head, tmp); | |
3158 | } | |
2ad9852d | 3159 | |
7d9d8943 AM |
3160 | return head; |
3161 | } | |
3162 | ||
2ad9852d RK |
3163 | /* This function fills in aa dw_cfa_location structure from a dwarf location |
3164 | descriptor sequence. */ | |
7d9d8943 AM |
3165 | |
3166 | static void | |
7080f735 | 3167 | get_cfa_from_loc_descr (dw_cfa_location *cfa, struct dw_loc_descr_struct *loc) |
7d9d8943 | 3168 | { |
556273e0 | 3169 | struct dw_loc_descr_struct *ptr; |
7d9d8943 AM |
3170 | cfa->offset = 0; |
3171 | cfa->base_offset = 0; | |
3172 | cfa->indirect = 0; | |
3173 | cfa->reg = -1; | |
3174 | ||
3175 | for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next) | |
3176 | { | |
3177 | enum dwarf_location_atom op = ptr->dw_loc_opc; | |
2ad9852d | 3178 | |
7d9d8943 | 3179 | switch (op) |
556273e0 | 3180 | { |
7d9d8943 AM |
3181 | case DW_OP_reg0: |
3182 | case DW_OP_reg1: | |
3183 | case DW_OP_reg2: | |
3184 | case DW_OP_reg3: | |
3185 | case DW_OP_reg4: | |
3186 | case DW_OP_reg5: | |
3187 | case DW_OP_reg6: | |
3188 | case DW_OP_reg7: | |
3189 | case DW_OP_reg8: | |
3190 | case DW_OP_reg9: | |
3191 | case DW_OP_reg10: | |
3192 | case DW_OP_reg11: | |
3193 | case DW_OP_reg12: | |
3194 | case DW_OP_reg13: | |
3195 | case DW_OP_reg14: | |
3196 | case DW_OP_reg15: | |
3197 | case DW_OP_reg16: | |
3198 | case DW_OP_reg17: | |
3199 | case DW_OP_reg18: | |
3200 | case DW_OP_reg19: | |
3201 | case DW_OP_reg20: | |
3202 | case DW_OP_reg21: | |
3203 | case DW_OP_reg22: | |
3204 | case DW_OP_reg23: | |
3205 | case DW_OP_reg24: | |
3206 | case DW_OP_reg25: | |
3207 | case DW_OP_reg26: | |
3208 | case DW_OP_reg27: | |
3209 | case DW_OP_reg28: | |
3210 | case DW_OP_reg29: | |
3211 | case DW_OP_reg30: | |
3212 | case DW_OP_reg31: | |
3213 | cfa->reg = op - DW_OP_reg0; | |
3214 | break; | |
3215 | case DW_OP_regx: | |
3216 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
3217 | break; | |
3218 | case DW_OP_breg0: | |
3219 | case DW_OP_breg1: | |
3220 | case DW_OP_breg2: | |
3221 | case DW_OP_breg3: | |
3222 | case DW_OP_breg4: | |
3223 | case DW_OP_breg5: | |
3224 | case DW_OP_breg6: | |
3225 | case DW_OP_breg7: | |
3226 | case DW_OP_breg8: | |
3227 | case DW_OP_breg9: | |
3228 | case DW_OP_breg10: | |
3229 | case DW_OP_breg11: | |
3230 | case DW_OP_breg12: | |
3231 | case DW_OP_breg13: | |
3232 | case DW_OP_breg14: | |
3233 | case DW_OP_breg15: | |
3234 | case DW_OP_breg16: | |
3235 | case DW_OP_breg17: | |
3236 | case DW_OP_breg18: | |
3237 | case DW_OP_breg19: | |
3238 | case DW_OP_breg20: | |
3239 | case DW_OP_breg21: | |
3240 | case DW_OP_breg22: | |
3241 | case DW_OP_breg23: | |
3242 | case DW_OP_breg24: | |
3243 | case DW_OP_breg25: | |
3244 | case DW_OP_breg26: | |
3245 | case DW_OP_breg27: | |
3246 | case DW_OP_breg28: | |
3247 | case DW_OP_breg29: | |
3248 | case DW_OP_breg30: | |
3249 | case DW_OP_breg31: | |
3250 | cfa->reg = op - DW_OP_breg0; | |
3251 | cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int; | |
3252 | break; | |
3253 | case DW_OP_bregx: | |
3254 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
3255 | cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int; | |
3256 | break; | |
3257 | case DW_OP_deref: | |
3258 | cfa->indirect = 1; | |
3259 | break; | |
3260 | case DW_OP_plus_uconst: | |
556273e0 | 3261 | cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned; |
7d9d8943 AM |
3262 | break; |
3263 | default: | |
a1f300c0 | 3264 | internal_error ("DW_LOC_OP %s not implemented\n", |
400500c4 | 3265 | dwarf_stack_op_name (ptr->dw_loc_opc)); |
7d9d8943 AM |
3266 | } |
3267 | } | |
3268 | } | |
3269 | #endif /* .debug_frame support */ | |
3270 | \f | |
3271 | /* And now, the support for symbolic debugging information. */ | |
3272 | #ifdef DWARF2_DEBUGGING_INFO | |
3273 | ||
117f9d28 | 3274 | /* .debug_str support. */ |
7080f735 AJ |
3275 | static int output_indirect_string (void **, void *); |
3276 | ||
3277 | static void dwarf2out_init (const char *); | |
3278 | static void dwarf2out_finish (const char *); | |
3279 | static void dwarf2out_define (unsigned int, const char *); | |
3280 | static void dwarf2out_undef (unsigned int, const char *); | |
3281 | static void dwarf2out_start_source_file (unsigned, const char *); | |
3282 | static void dwarf2out_end_source_file (unsigned); | |
3283 | static void dwarf2out_begin_block (unsigned, unsigned); | |
3284 | static void dwarf2out_end_block (unsigned, unsigned); | |
3285 | static bool dwarf2out_ignore_block (tree); | |
3286 | static void dwarf2out_global_decl (tree); | |
21d13d83 | 3287 | static void dwarf2out_type_decl (tree, int); |
6097b0c3 | 3288 | static void dwarf2out_imported_module_or_decl (tree, tree); |
7080f735 | 3289 | static void dwarf2out_abstract_function (tree); |
0a2d3d69 DB |
3290 | static void dwarf2out_var_location (rtx); |
3291 | static void dwarf2out_begin_function (tree); | |
7f905405 NB |
3292 | |
3293 | /* The debug hooks structure. */ | |
3294 | ||
54b6670a | 3295 | const struct gcc_debug_hooks dwarf2_debug_hooks = |
7f905405 NB |
3296 | { |
3297 | dwarf2out_init, | |
3298 | dwarf2out_finish, | |
3299 | dwarf2out_define, | |
3300 | dwarf2out_undef, | |
3301 | dwarf2out_start_source_file, | |
a5a42b92 NB |
3302 | dwarf2out_end_source_file, |
3303 | dwarf2out_begin_block, | |
e2a12aca | 3304 | dwarf2out_end_block, |
e1772ac0 | 3305 | dwarf2out_ignore_block, |
e2a12aca | 3306 | dwarf2out_source_line, |
653e276c | 3307 | dwarf2out_begin_prologue, |
702ada3d | 3308 | debug_nothing_int_charstar, /* end_prologue */ |
e2a12aca | 3309 | dwarf2out_end_epilogue, |
0a2d3d69 | 3310 | dwarf2out_begin_function, |
2b85879e NB |
3311 | debug_nothing_int, /* end_function */ |
3312 | dwarf2out_decl, /* function_decl */ | |
3313 | dwarf2out_global_decl, | |
21d13d83 | 3314 | dwarf2out_type_decl, /* type_decl */ |
6097b0c3 | 3315 | dwarf2out_imported_module_or_decl, |
e1772ac0 NB |
3316 | debug_nothing_tree, /* deferred_inline_function */ |
3317 | /* The DWARF 2 backend tries to reduce debugging bloat by not | |
3318 | emitting the abstract description of inline functions until | |
3319 | something tries to reference them. */ | |
3320 | dwarf2out_abstract_function, /* outlining_inline_function */ | |
33b49800 | 3321 | debug_nothing_rtx, /* label */ |
014a1138 | 3322 | debug_nothing_int, /* handle_pch */ |
0a2d3d69 | 3323 | dwarf2out_var_location |
7f905405 | 3324 | }; |
17211ab5 | 3325 | #endif |
7f905405 | 3326 | \f |
7d9d8943 AM |
3327 | /* NOTE: In the comments in this file, many references are made to |
3328 | "Debugging Information Entries". This term is abbreviated as `DIE' | |
3329 | throughout the remainder of this file. */ | |
3330 | ||
3331 | /* An internal representation of the DWARF output is built, and then | |
3332 | walked to generate the DWARF debugging info. The walk of the internal | |
3333 | representation is done after the entire program has been compiled. | |
3334 | The types below are used to describe the internal representation. */ | |
3335 | ||
3336 | /* Various DIE's use offsets relative to the beginning of the | |
3337 | .debug_info section to refer to each other. */ | |
3338 | ||
3339 | typedef long int dw_offset; | |
3340 | ||
3341 | /* Define typedefs here to avoid circular dependencies. */ | |
3342 | ||
3343 | typedef struct dw_attr_struct *dw_attr_ref; | |
3344 | typedef struct dw_line_info_struct *dw_line_info_ref; | |
3345 | typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref; | |
3346 | typedef struct pubname_struct *pubname_ref; | |
a20612aa | 3347 | typedef struct dw_ranges_struct *dw_ranges_ref; |
7d9d8943 AM |
3348 | |
3349 | /* Each entry in the line_info_table maintains the file and | |
3350 | line number associated with the label generated for that | |
3351 | entry. The label gives the PC value associated with | |
3352 | the line number entry. */ | |
3353 | ||
17211ab5 | 3354 | typedef struct dw_line_info_struct GTY(()) |
7d9d8943 AM |
3355 | { |
3356 | unsigned long dw_file_num; | |
3357 | unsigned long dw_line_num; | |
3358 | } | |
3359 | dw_line_info_entry; | |
3360 | ||
3361 | /* Line information for functions in separate sections; each one gets its | |
3362 | own sequence. */ | |
17211ab5 | 3363 | typedef struct dw_separate_line_info_struct GTY(()) |
7d9d8943 AM |
3364 | { |
3365 | unsigned long dw_file_num; | |
3366 | unsigned long dw_line_num; | |
3367 | unsigned long function; | |
3368 | } | |
3369 | dw_separate_line_info_entry; | |
3370 | ||
3371 | /* Each DIE attribute has a field specifying the attribute kind, | |
3372 | a link to the next attribute in the chain, and an attribute value. | |
3373 | Attributes are typically linked below the DIE they modify. */ | |
3374 | ||
17211ab5 | 3375 | typedef struct dw_attr_struct GTY(()) |
7d9d8943 AM |
3376 | { |
3377 | enum dwarf_attribute dw_attr; | |
3378 | dw_attr_ref dw_attr_next; | |
3379 | dw_val_node dw_attr_val; | |
3380 | } | |
3381 | dw_attr_node; | |
3382 | ||
3383 | /* The Debugging Information Entry (DIE) structure */ | |
3384 | ||
17211ab5 | 3385 | typedef struct die_struct GTY(()) |
7d9d8943 AM |
3386 | { |
3387 | enum dwarf_tag die_tag; | |
881c6935 | 3388 | char *die_symbol; |
7d9d8943 AM |
3389 | dw_attr_ref die_attr; |
3390 | dw_die_ref die_parent; | |
3391 | dw_die_ref die_child; | |
3392 | dw_die_ref die_sib; | |
47fcfa7b | 3393 | dw_die_ref die_definition; /* ref from a specification to its definition */ |
7d9d8943 AM |
3394 | dw_offset die_offset; |
3395 | unsigned long die_abbrev; | |
1bfb5f8f | 3396 | int die_mark; |
636c7bc4 | 3397 | unsigned int decl_id; |
7d9d8943 AM |
3398 | } |
3399 | die_node; | |
3400 | ||
3401 | /* The pubname structure */ | |
3402 | ||
17211ab5 | 3403 | typedef struct pubname_struct GTY(()) |
7d9d8943 AM |
3404 | { |
3405 | dw_die_ref die; | |
556273e0 | 3406 | char *name; |
7d9d8943 AM |
3407 | } |
3408 | pubname_entry; | |
3409 | ||
17211ab5 | 3410 | struct dw_ranges_struct GTY(()) |
a20612aa RH |
3411 | { |
3412 | int block_num; | |
3413 | }; | |
3414 | ||
7d9d8943 | 3415 | /* The limbo die list structure. */ |
17211ab5 | 3416 | typedef struct limbo_die_struct GTY(()) |
7d9d8943 AM |
3417 | { |
3418 | dw_die_ref die; | |
54ba1f0d | 3419 | tree created_for; |
7d9d8943 AM |
3420 | struct limbo_die_struct *next; |
3421 | } | |
3422 | limbo_die_node; | |
3423 | ||
3424 | /* How to start an assembler comment. */ | |
3425 | #ifndef ASM_COMMENT_START | |
3426 | #define ASM_COMMENT_START ";#" | |
3427 | #endif | |
3428 | ||
cc2902df | 3429 | /* Define a macro which returns nonzero for a TYPE_DECL which was |
7d9d8943 AM |
3430 | implicitly generated for a tagged type. |
3431 | ||
3432 | Note that unlike the gcc front end (which generates a NULL named | |
3433 | TYPE_DECL node for each complete tagged type, each array type, and | |
3434 | each function type node created) the g++ front end generates a | |
3435 | _named_ TYPE_DECL node for each tagged type node created. | |
3436 | These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to | |
3437 | generate a DW_TAG_typedef DIE for them. */ | |
3438 | ||
3439 | #define TYPE_DECL_IS_STUB(decl) \ | |
3440 | (DECL_NAME (decl) == NULL_TREE \ | |
3441 | || (DECL_ARTIFICIAL (decl) \ | |
3442 | && is_tagged_type (TREE_TYPE (decl)) \ | |
3443 | && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \ | |
3444 | /* This is necessary for stub decls that \ | |
3445 | appear in nested inline functions. */ \ | |
3446 | || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \ | |
3447 | && (decl_ultimate_origin (decl) \ | |
3448 | == TYPE_STUB_DECL (TREE_TYPE (decl))))))) | |
3449 | ||
3450 | /* Information concerning the compilation unit's programming | |
3451 | language, and compiler version. */ | |
3452 | ||
7d9d8943 | 3453 | /* Fixed size portion of the DWARF compilation unit header. */ |
9eb0ef7a KB |
3454 | #define DWARF_COMPILE_UNIT_HEADER_SIZE \ |
3455 | (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 3) | |
7d9d8943 | 3456 | |
7d9d8943 AM |
3457 | /* Fixed size portion of public names info. */ |
3458 | #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2) | |
3459 | ||
3460 | /* Fixed size portion of the address range info. */ | |
3461 | #define DWARF_ARANGES_HEADER_SIZE \ | |
c583e7c3 KB |
3462 | (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \ |
3463 | DWARF2_ADDR_SIZE * 2) \ | |
3464 | - DWARF_INITIAL_LENGTH_SIZE) | |
7d9d8943 AM |
3465 | |
3466 | /* Size of padding portion in the address range info. It must be | |
3467 | aligned to twice the pointer size. */ | |
3468 | #define DWARF_ARANGES_PAD_SIZE \ | |
c583e7c3 KB |
3469 | (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \ |
3470 | DWARF2_ADDR_SIZE * 2) \ | |
3471 | - (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4)) | |
7d9d8943 | 3472 | |
9d147085 | 3473 | /* Use assembler line directives if available. */ |
7d9d8943 | 3474 | #ifndef DWARF2_ASM_LINE_DEBUG_INFO |
9d147085 RH |
3475 | #ifdef HAVE_AS_DWARF2_DEBUG_LINE |
3476 | #define DWARF2_ASM_LINE_DEBUG_INFO 1 | |
3477 | #else | |
7d9d8943 AM |
3478 | #define DWARF2_ASM_LINE_DEBUG_INFO 0 |
3479 | #endif | |
9d147085 | 3480 | #endif |
7d9d8943 | 3481 | |
7d9d8943 AM |
3482 | /* Minimum line offset in a special line info. opcode. |
3483 | This value was chosen to give a reasonable range of values. */ | |
3484 | #define DWARF_LINE_BASE -10 | |
3485 | ||
a1f300c0 | 3486 | /* First special line opcode - leave room for the standard opcodes. */ |
7d9d8943 AM |
3487 | #define DWARF_LINE_OPCODE_BASE 10 |
3488 | ||
3489 | /* Range of line offsets in a special line info. opcode. */ | |
3490 | #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1) | |
3491 | ||
3492 | /* Flag that indicates the initial value of the is_stmt_start flag. | |
3493 | In the present implementation, we do not mark any lines as | |
3494 | the beginning of a source statement, because that information | |
3495 | is not made available by the GCC front-end. */ | |
3496 | #define DWARF_LINE_DEFAULT_IS_STMT_START 1 | |
3497 | ||
c1b50e49 | 3498 | #ifdef DWARF2_DEBUGGING_INFO |
7d9d8943 AM |
3499 | /* This location is used by calc_die_sizes() to keep track |
3500 | the offset of each DIE within the .debug_info section. */ | |
3501 | static unsigned long next_die_offset; | |
c1b50e49 | 3502 | #endif |
7d9d8943 AM |
3503 | |
3504 | /* Record the root of the DIE's built for the current compilation unit. */ | |
17211ab5 | 3505 | static GTY(()) dw_die_ref comp_unit_die; |
7d9d8943 AM |
3506 | |
3507 | /* A list of DIEs with a NULL parent waiting to be relocated. */ | |
17211ab5 | 3508 | static GTY(()) limbo_die_node *limbo_die_list; |
7d9d8943 | 3509 | |
981975b6 | 3510 | /* Filenames referenced by this compilation unit. */ |
c4274b22 | 3511 | static GTY(()) varray_type file_table; |
73c68f61 | 3512 | static GTY(()) varray_type file_table_emitted; |
c4274b22 | 3513 | static GTY(()) size_t file_table_last_lookup_index; |
2e18bbae | 3514 | |
636c7bc4 JZ |
3515 | /* A hash table of references to DIE's that describe declarations. |
3516 | The key is a DECL_UID() which is a unique number identifying each decl. */ | |
3517 | static GTY ((param_is (struct die_struct))) htab_t decl_die_table; | |
7d9d8943 | 3518 | |
0a2d3d69 DB |
3519 | /* Node of the variable location list. */ |
3520 | struct var_loc_node GTY ((chain_next ("%h.next"))) | |
3521 | { | |
3522 | rtx GTY (()) var_loc_note; | |
3523 | const char * GTY (()) label; | |
3524 | struct var_loc_node * GTY (()) next; | |
3525 | }; | |
3526 | ||
3527 | /* Variable location list. */ | |
3528 | struct var_loc_list_def GTY (()) | |
3529 | { | |
3530 | struct var_loc_node * GTY (()) first; | |
3531 | ||
3532 | /* Do not mark the last element of the chained list because | |
3533 | it is marked through the chain. */ | |
3534 | struct var_loc_node * GTY ((skip ("%h"))) last; | |
3535 | ||
3536 | /* DECL_UID of the variable decl. */ | |
3537 | unsigned int decl_id; | |
3538 | }; | |
3539 | typedef struct var_loc_list_def var_loc_list; | |
3540 | ||
0a2d3d69 DB |
3541 | |
3542 | /* Table of decl location linked lists. */ | |
3543 | static GTY ((param_is (var_loc_list))) htab_t decl_loc_table; | |
3544 | ||
7d9d8943 AM |
3545 | /* A pointer to the base of a list of references to DIE's that |
3546 | are uniquely identified by their tag, presence/absence of | |
3547 | children DIE's, and list of attribute/value pairs. */ | |
7080f735 | 3548 | static GTY((length ("abbrev_die_table_allocated"))) |
17211ab5 | 3549 | dw_die_ref *abbrev_die_table; |
7d9d8943 AM |
3550 | |
3551 | /* Number of elements currently allocated for abbrev_die_table. */ | |
c2e9147c | 3552 | static GTY(()) unsigned abbrev_die_table_allocated; |
7d9d8943 AM |
3553 | |
3554 | /* Number of elements in type_die_table currently in use. */ | |
c2e9147c | 3555 | static GTY(()) unsigned abbrev_die_table_in_use; |
7d9d8943 AM |
3556 | |
3557 | /* Size (in elements) of increments by which we may expand the | |
3558 | abbrev_die_table. */ | |
3559 | #define ABBREV_DIE_TABLE_INCREMENT 256 | |
3560 | ||
3561 | /* A pointer to the base of a table that contains line information | |
3562 | for each source code line in .text in the compilation unit. */ | |
7080f735 | 3563 | static GTY((length ("line_info_table_allocated"))) |
17211ab5 | 3564 | dw_line_info_ref line_info_table; |
7d9d8943 AM |
3565 | |
3566 | /* Number of elements currently allocated for line_info_table. */ | |
c2e9147c | 3567 | static GTY(()) unsigned line_info_table_allocated; |
7d9d8943 | 3568 | |
17211ab5 | 3569 | /* Number of elements in line_info_table currently in use. */ |
c2e9147c | 3570 | static GTY(()) unsigned line_info_table_in_use; |
7d9d8943 AM |
3571 | |
3572 | /* A pointer to the base of a table that contains line information | |
3573 | for each source code line outside of .text in the compilation unit. */ | |
17211ab5 GK |
3574 | static GTY ((length ("separate_line_info_table_allocated"))) |
3575 | dw_separate_line_info_ref separate_line_info_table; | |
7d9d8943 AM |
3576 | |
3577 | /* Number of elements currently allocated for separate_line_info_table. */ | |
c2e9147c | 3578 | static GTY(()) unsigned separate_line_info_table_allocated; |
7d9d8943 | 3579 | |
17211ab5 | 3580 | /* Number of elements in separate_line_info_table currently in use. */ |
c2e9147c | 3581 | static GTY(()) unsigned separate_line_info_table_in_use; |
7d9d8943 AM |
3582 | |
3583 | /* Size (in elements) of increments by which we may expand the | |
3584 | line_info_table. */ | |
3585 | #define LINE_INFO_TABLE_INCREMENT 1024 | |
3586 | ||
3587 | /* A pointer to the base of a table that contains a list of publicly | |
3588 | accessible names. */ | |
17211ab5 | 3589 | static GTY ((length ("pubname_table_allocated"))) pubname_ref pubname_table; |
7d9d8943 AM |
3590 | |
3591 | /* Number of elements currently allocated for pubname_table. */ | |
c2e9147c | 3592 | static GTY(()) unsigned pubname_table_allocated; |
7d9d8943 AM |
3593 | |
3594 | /* Number of elements in pubname_table currently in use. */ | |
c2e9147c | 3595 | static GTY(()) unsigned pubname_table_in_use; |
7d9d8943 AM |
3596 | |
3597 | /* Size (in elements) of increments by which we may expand the | |
3598 | pubname_table. */ | |
3599 | #define PUBNAME_TABLE_INCREMENT 64 | |
3600 | ||
a20612aa | 3601 | /* Array of dies for which we should generate .debug_arange info. */ |
17211ab5 | 3602 | static GTY((length ("arange_table_allocated"))) dw_die_ref *arange_table; |
7d9d8943 AM |
3603 | |
3604 | /* Number of elements currently allocated for arange_table. */ | |
c2e9147c | 3605 | static GTY(()) unsigned arange_table_allocated; |
7d9d8943 AM |
3606 | |
3607 | /* Number of elements in arange_table currently in use. */ | |
c2e9147c | 3608 | static GTY(()) unsigned arange_table_in_use; |
7d9d8943 AM |
3609 | |
3610 | /* Size (in elements) of increments by which we may expand the | |
3611 | arange_table. */ | |
3612 | #define ARANGE_TABLE_INCREMENT 64 | |
3613 | ||
a20612aa | 3614 | /* Array of dies for which we should generate .debug_ranges info. */ |
17211ab5 | 3615 | static GTY ((length ("ranges_table_allocated"))) dw_ranges_ref ranges_table; |
a20612aa RH |
3616 | |
3617 | /* Number of elements currently allocated for ranges_table. */ | |
c2e9147c | 3618 | static GTY(()) unsigned ranges_table_allocated; |
a20612aa RH |
3619 | |
3620 | /* Number of elements in ranges_table currently in use. */ | |
c2e9147c | 3621 | static GTY(()) unsigned ranges_table_in_use; |
a20612aa RH |
3622 | |
3623 | /* Size (in elements) of increments by which we may expand the | |
3624 | ranges_table. */ | |
3625 | #define RANGES_TABLE_INCREMENT 64 | |
3626 | ||
63e46568 | 3627 | /* Whether we have location lists that need outputting */ |
c2e9147c | 3628 | static GTY(()) unsigned have_location_lists; |
63e46568 | 3629 | |
57d4f65c ZW |
3630 | /* Unique label counter. */ |
3631 | static GTY(()) unsigned int loclabel_num; | |
3632 | ||
c2e9147c | 3633 | #ifdef DWARF2_DEBUGGING_INFO |
7d9d8943 AM |
3634 | /* Record whether the function being analyzed contains inlined functions. */ |
3635 | static int current_function_has_inlines; | |
c1b50e49 | 3636 | #endif |
7d9d8943 AM |
3637 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
3638 | static int comp_unit_has_inlines; | |
3639 | #endif | |
3640 | ||
e0bb17a8 | 3641 | /* Number of file tables emitted in maybe_emit_file(). */ |
c2e9147c GK |
3642 | static GTY(()) int emitcount = 0; |
3643 | ||
71c0e7fc | 3644 | /* Number of internal labels generated by gen_internal_sym(). */ |
c2e9147c GK |
3645 | static GTY(()) int label_num; |
3646 | ||
17211ab5 GK |
3647 | #ifdef DWARF2_DEBUGGING_INFO |
3648 | ||
7d9d8943 AM |
3649 | /* Forward declarations for functions defined in this file. */ |
3650 | ||
7080f735 AJ |
3651 | static int is_pseudo_reg (rtx); |
3652 | static tree type_main_variant (tree); | |
3653 | static int is_tagged_type (tree); | |
3654 | static const char *dwarf_tag_name (unsigned); | |
3655 | static const char *dwarf_attr_name (unsigned); | |
3656 | static const char *dwarf_form_name (unsigned); | |
7d9d8943 | 3657 | #if 0 |
7080f735 | 3658 | static const char *dwarf_type_encoding_name (unsigned); |
7d9d8943 | 3659 | #endif |
7080f735 AJ |
3660 | static tree decl_ultimate_origin (tree); |
3661 | static tree block_ultimate_origin (tree); | |
3662 | static tree decl_class_context (tree); | |
3663 | static void add_dwarf_attr (dw_die_ref, dw_attr_ref); | |
3664 | static inline enum dw_val_class AT_class (dw_attr_ref); | |
3665 | static void add_AT_flag (dw_die_ref, enum dwarf_attribute, unsigned); | |
3666 | static inline unsigned AT_flag (dw_attr_ref); | |
799f628a JH |
3667 | static void add_AT_int (dw_die_ref, enum dwarf_attribute, HOST_WIDE_INT); |
3668 | static inline HOST_WIDE_INT AT_int (dw_attr_ref); | |
3669 | static void add_AT_unsigned (dw_die_ref, enum dwarf_attribute, unsigned HOST_WIDE_INT); | |
3670 | static inline unsigned HOST_WIDE_INT AT_unsigned (dw_attr_ref); | |
7080f735 AJ |
3671 | static void add_AT_long_long (dw_die_ref, enum dwarf_attribute, unsigned long, |
3672 | unsigned long); | |
e7ee3914 AM |
3673 | static inline void add_AT_vec (dw_die_ref, enum dwarf_attribute, unsigned int, |
3674 | unsigned int, unsigned char *); | |
7080f735 AJ |
3675 | static hashval_t debug_str_do_hash (const void *); |
3676 | static int debug_str_eq (const void *, const void *); | |
3677 | static void add_AT_string (dw_die_ref, enum dwarf_attribute, const char *); | |
3678 | static inline const char *AT_string (dw_attr_ref); | |
3679 | static int AT_string_form (dw_attr_ref); | |
3680 | static void add_AT_die_ref (dw_die_ref, enum dwarf_attribute, dw_die_ref); | |
47fcfa7b | 3681 | static void add_AT_specification (dw_die_ref, dw_die_ref); |
7080f735 AJ |
3682 | static inline dw_die_ref AT_ref (dw_attr_ref); |
3683 | static inline int AT_ref_external (dw_attr_ref); | |
3684 | static inline void set_AT_ref_external (dw_attr_ref, int); | |
3685 | static void add_AT_fde_ref (dw_die_ref, enum dwarf_attribute, unsigned); | |
3686 | static void add_AT_loc (dw_die_ref, enum dwarf_attribute, dw_loc_descr_ref); | |
3687 | static inline dw_loc_descr_ref AT_loc (dw_attr_ref); | |
3688 | static void add_AT_loc_list (dw_die_ref, enum dwarf_attribute, | |
3689 | dw_loc_list_ref); | |
3690 | static inline dw_loc_list_ref AT_loc_list (dw_attr_ref); | |
3691 | static void add_AT_addr (dw_die_ref, enum dwarf_attribute, rtx); | |
3692 | static inline rtx AT_addr (dw_attr_ref); | |
3693 | static void add_AT_lbl_id (dw_die_ref, enum dwarf_attribute, const char *); | |
3694 | static void add_AT_lbl_offset (dw_die_ref, enum dwarf_attribute, const char *); | |
799f628a JH |
3695 | static void add_AT_offset (dw_die_ref, enum dwarf_attribute, |
3696 | unsigned HOST_WIDE_INT); | |
7080f735 AJ |
3697 | static void add_AT_range_list (dw_die_ref, enum dwarf_attribute, |
3698 | unsigned long); | |
3699 | static inline const char *AT_lbl (dw_attr_ref); | |
3700 | static dw_attr_ref get_AT (dw_die_ref, enum dwarf_attribute); | |
3701 | static const char *get_AT_low_pc (dw_die_ref); | |
3702 | static const char *get_AT_hi_pc (dw_die_ref); | |
3703 | static const char *get_AT_string (dw_die_ref, enum dwarf_attribute); | |
3704 | static int get_AT_flag (dw_die_ref, enum dwarf_attribute); | |
3705 | static unsigned get_AT_unsigned (dw_die_ref, enum dwarf_attribute); | |
3706 | static inline dw_die_ref get_AT_ref (dw_die_ref, enum dwarf_attribute); | |
3707 | static bool is_c_family (void); | |
3708 | static bool is_cxx (void); | |
3709 | static bool is_java (void); | |
3710 | static bool is_fortran (void); | |
3711 | static bool is_ada (void); | |
3712 | static void remove_AT (dw_die_ref, enum dwarf_attribute); | |
6097b0c3 | 3713 | static void remove_child_TAG (dw_die_ref, enum dwarf_tag); |
7080f735 AJ |
3714 | static inline void free_die (dw_die_ref); |
3715 | static void remove_children (dw_die_ref); | |
3716 | static void add_child_die (dw_die_ref, dw_die_ref); | |
3717 | static dw_die_ref new_die (enum dwarf_tag, dw_die_ref, tree); | |
3718 | static dw_die_ref lookup_type_die (tree); | |
3719 | static void equate_type_number_to_die (tree, dw_die_ref); | |
636c7bc4 JZ |
3720 | static hashval_t decl_die_table_hash (const void *); |
3721 | static int decl_die_table_eq (const void *, const void *); | |
7080f735 | 3722 | static dw_die_ref lookup_decl_die (tree); |
0a2d3d69 DB |
3723 | static hashval_t decl_loc_table_hash (const void *); |
3724 | static int decl_loc_table_eq (const void *, const void *); | |
3725 | static var_loc_list *lookup_decl_loc (tree); | |
7080f735 | 3726 | static void equate_decl_number_to_die (tree, dw_die_ref); |
0a2d3d69 | 3727 | static void add_var_loc_to_decl (tree, struct var_loc_node *); |
7080f735 AJ |
3728 | static void print_spaces (FILE *); |
3729 | static void print_die (dw_die_ref, FILE *); | |
3730 | static void print_dwarf_line_table (FILE *); | |
3731 | static void reverse_die_lists (dw_die_ref); | |
3732 | static void reverse_all_dies (dw_die_ref); | |
3733 | static dw_die_ref push_new_compile_unit (dw_die_ref, dw_die_ref); | |
3734 | static dw_die_ref pop_compile_unit (dw_die_ref); | |
3735 | static void loc_checksum (dw_loc_descr_ref, struct md5_ctx *); | |
3736 | static void attr_checksum (dw_attr_ref, struct md5_ctx *, int *); | |
3737 | static void die_checksum (dw_die_ref, struct md5_ctx *, int *); | |
3738 | static int same_loc_p (dw_loc_descr_ref, dw_loc_descr_ref, int *); | |
3739 | static int same_dw_val_p (dw_val_node *, dw_val_node *, int *); | |
3740 | static int same_attr_p (dw_attr_ref, dw_attr_ref, int *); | |
3741 | static int same_die_p (dw_die_ref, dw_die_ref, int *); | |
3742 | static int same_die_p_wrap (dw_die_ref, dw_die_ref); | |
3743 | static void compute_section_prefix (dw_die_ref); | |
3744 | static int is_type_die (dw_die_ref); | |
3745 | static int is_comdat_die (dw_die_ref); | |
3746 | static int is_symbol_die (dw_die_ref); | |
3747 | static void assign_symbol_names (dw_die_ref); | |
3748 | static void break_out_includes (dw_die_ref); | |
3749 | static hashval_t htab_cu_hash (const void *); | |
3750 | static int htab_cu_eq (const void *, const void *); | |
3751 | static void htab_cu_del (void *); | |
3752 | static int check_duplicate_cu (dw_die_ref, htab_t, unsigned *); | |
3753 | static void record_comdat_symbol_number (dw_die_ref, htab_t, unsigned); | |
3754 | static void add_sibling_attributes (dw_die_ref); | |
3755 | static void build_abbrev_table (dw_die_ref); | |
3756 | static void output_location_lists (dw_die_ref); | |
3757 | static int constant_size (long unsigned); | |
3758 | static unsigned long size_of_die (dw_die_ref); | |
3759 | static void calc_die_sizes (dw_die_ref); | |
3760 | static void mark_dies (dw_die_ref); | |
3761 | static void unmark_dies (dw_die_ref); | |
3762 | static void unmark_all_dies (dw_die_ref); | |
3763 | static unsigned long size_of_pubnames (void); | |
3764 | static unsigned long size_of_aranges (void); | |
3765 | static enum dwarf_form value_format (dw_attr_ref); | |
3766 | static void output_value_format (dw_attr_ref); | |
3767 | static void output_abbrev_section (void); | |
3768 | static void output_die_symbol (dw_die_ref); | |
3769 | static void output_die (dw_die_ref); | |
3770 | static void output_compilation_unit_header (void); | |
3771 | static void output_comp_unit (dw_die_ref, int); | |
3772 | static const char *dwarf2_name (tree, int); | |
3773 | static void add_pubname (tree, dw_die_ref); | |
3774 | static void output_pubnames (void); | |
3775 | static void add_arange (tree, dw_die_ref); | |
3776 | static void output_aranges (void); | |
3777 | static unsigned int add_ranges (tree); | |
3778 | static void output_ranges (void); | |
3779 | static void output_line_info (void); | |
3780 | static void output_file_names (void); | |
3781 | static dw_die_ref base_type_die (tree); | |
3782 | static tree root_type (tree); | |
3783 | static int is_base_type (tree); | |
e7d23ce3 | 3784 | static bool is_subrange_type (tree); |
fbfd77b8 | 3785 | static dw_die_ref subrange_type_die (tree, dw_die_ref); |
7080f735 AJ |
3786 | static dw_die_ref modified_type_die (tree, int, int, dw_die_ref); |
3787 | static int type_is_enum (tree); | |
23959f19 | 3788 | static unsigned int dbx_reg_number (rtx); |
7080f735 AJ |
3789 | static dw_loc_descr_ref reg_loc_descriptor (rtx); |
3790 | static dw_loc_descr_ref one_reg_loc_descriptor (unsigned int); | |
3791 | static dw_loc_descr_ref multiple_reg_loc_descriptor (rtx, rtx); | |
3792 | static dw_loc_descr_ref int_loc_descriptor (HOST_WIDE_INT); | |
0a2d3d69 | 3793 | static dw_loc_descr_ref based_loc_descr (unsigned, HOST_WIDE_INT, bool); |
7080f735 | 3794 | static int is_based_loc (rtx); |
0a2d3d69 | 3795 | static dw_loc_descr_ref mem_loc_descriptor (rtx, enum machine_mode mode, bool); |
7080f735 | 3796 | static dw_loc_descr_ref concat_loc_descriptor (rtx, rtx); |
0a2d3d69 | 3797 | static dw_loc_descr_ref loc_descriptor (rtx, bool); |
7080f735 AJ |
3798 | static dw_loc_descr_ref loc_descriptor_from_tree (tree, int); |
3799 | static HOST_WIDE_INT ceiling (HOST_WIDE_INT, unsigned int); | |
3800 | static tree field_type (tree); | |
3801 | static unsigned int simple_type_align_in_bits (tree); | |
3802 | static unsigned int simple_decl_align_in_bits (tree); | |
3803 | static unsigned HOST_WIDE_INT simple_type_size_in_bits (tree); | |
3804 | static HOST_WIDE_INT field_byte_offset (tree); | |
3805 | static void add_AT_location_description (dw_die_ref, enum dwarf_attribute, | |
3806 | dw_loc_descr_ref); | |
3807 | static void add_data_member_location_attribute (dw_die_ref, tree); | |
3808 | static void add_const_value_attribute (dw_die_ref, rtx); | |
e7ee3914 AM |
3809 | static void insert_int (HOST_WIDE_INT, unsigned, unsigned char *); |
3810 | static HOST_WIDE_INT extract_int (const unsigned char *, unsigned); | |
3811 | static void insert_float (rtx, unsigned char *); | |
7080f735 | 3812 | static rtx rtl_for_decl_location (tree); |
0a2d3d69 DB |
3813 | static void add_location_or_const_value_attribute (dw_die_ref, tree, |
3814 | enum dwarf_attribute); | |
7080f735 AJ |
3815 | static void tree_add_const_value_attribute (dw_die_ref, tree); |
3816 | static void add_name_attribute (dw_die_ref, const char *); | |
3817 | static void add_comp_dir_attribute (dw_die_ref); | |
3818 | static void add_bound_info (dw_die_ref, enum dwarf_attribute, tree); | |
3819 | static void add_subscript_info (dw_die_ref, tree); | |
3820 | static void add_byte_size_attribute (dw_die_ref, tree); | |
3821 | static void add_bit_offset_attribute (dw_die_ref, tree); | |
3822 | static void add_bit_size_attribute (dw_die_ref, tree); | |
3823 | static void add_prototyped_attribute (dw_die_ref, tree); | |
3824 | static void add_abstract_origin_attribute (dw_die_ref, tree); | |
3825 | static void add_pure_or_virtual_attribute (dw_die_ref, tree); | |
3826 | static void add_src_coords_attributes (dw_die_ref, tree); | |
3827 | static void add_name_and_src_coords_attributes (dw_die_ref, tree); | |
3828 | static void push_decl_scope (tree); | |
3829 | static void pop_decl_scope (void); | |
3830 | static dw_die_ref scope_die_for (tree, dw_die_ref); | |
3831 | static inline int local_scope_p (dw_die_ref); | |
66c78aa9 | 3832 | static inline int class_or_namespace_scope_p (dw_die_ref); |
7080f735 AJ |
3833 | static void add_type_attribute (dw_die_ref, tree, int, int, dw_die_ref); |
3834 | static const char *type_tag (tree); | |
3835 | static tree member_declared_type (tree); | |
7d9d8943 | 3836 | #if 0 |
7080f735 | 3837 | static const char *decl_start_label (tree); |
7d9d8943 | 3838 | #endif |
7080f735 AJ |
3839 | static void gen_array_type_die (tree, dw_die_ref); |
3840 | static void gen_set_type_die (tree, dw_die_ref); | |
7d9d8943 | 3841 | #if 0 |
7080f735 | 3842 | static void gen_entry_point_die (tree, dw_die_ref); |
7d9d8943 | 3843 | #endif |
7080f735 AJ |
3844 | static void gen_inlined_enumeration_type_die (tree, dw_die_ref); |
3845 | static void gen_inlined_structure_type_die (tree, dw_die_ref); | |
3846 | static void gen_inlined_union_type_die (tree, dw_die_ref); | |
de99511b | 3847 | static dw_die_ref gen_enumeration_type_die (tree, dw_die_ref); |
7080f735 AJ |
3848 | static dw_die_ref gen_formal_parameter_die (tree, dw_die_ref); |
3849 | static void gen_unspecified_parameters_die (tree, dw_die_ref); | |
3850 | static void gen_formal_types_die (tree, dw_die_ref); | |
3851 | static void gen_subprogram_die (tree, dw_die_ref); | |
3852 | static void gen_variable_die (tree, dw_die_ref); | |
3853 | static void gen_label_die (tree, dw_die_ref); | |
3854 | static void gen_lexical_block_die (tree, dw_die_ref, int); | |
3855 | static void gen_inlined_subroutine_die (tree, dw_die_ref, int); | |
3856 | static void gen_field_die (tree, dw_die_ref); | |
3857 | static void gen_ptr_to_mbr_type_die (tree, dw_die_ref); | |
3858 | static dw_die_ref gen_compile_unit_die (const char *); | |
3859 | static void gen_string_type_die (tree, dw_die_ref); | |
3860 | static void gen_inheritance_die (tree, tree, dw_die_ref); | |
3861 | static void gen_member_die (tree, dw_die_ref); | |
3862 | static void gen_struct_or_union_type_die (tree, dw_die_ref); | |
3863 | static void gen_subroutine_type_die (tree, dw_die_ref); | |
3864 | static void gen_typedef_die (tree, dw_die_ref); | |
3865 | static void gen_type_die (tree, dw_die_ref); | |
3866 | static void gen_tagged_type_instantiation_die (tree, dw_die_ref); | |
3867 | static void gen_block_die (tree, dw_die_ref, int); | |
3868 | static void decls_for_scope (tree, dw_die_ref, int); | |
3869 | static int is_redundant_typedef (tree); | |
66c78aa9 | 3870 | static void gen_namespace_die (tree); |
7080f735 | 3871 | static void gen_decl_die (tree, dw_die_ref); |
6097b0c3 DP |
3872 | static dw_die_ref force_decl_die (tree); |
3873 | static dw_die_ref force_type_die (tree); | |
66c78aa9 JM |
3874 | static dw_die_ref setup_namespace_context (tree, dw_die_ref); |
3875 | static void declare_in_namespace (tree, dw_die_ref); | |
7080f735 AJ |
3876 | static unsigned lookup_filename (const char *); |
3877 | static void init_file_table (void); | |
3878 | static void retry_incomplete_types (void); | |
3879 | static void gen_type_die_for_member (tree, tree, dw_die_ref); | |
3880 | static void splice_child_die (dw_die_ref, dw_die_ref); | |
3881 | static int file_info_cmp (const void *, const void *); | |
3882 | static dw_loc_list_ref new_loc_list (dw_loc_descr_ref, const char *, | |
3883 | const char *, const char *, unsigned); | |
3884 | static void add_loc_descr_to_loc_list (dw_loc_list_ref *, dw_loc_descr_ref, | |
3885 | const char *, const char *, | |
3886 | const char *); | |
3887 | static void output_loc_list (dw_loc_list_ref); | |
3888 | static char *gen_internal_sym (const char *); | |
3889 | ||
3890 | static void prune_unmark_dies (dw_die_ref); | |
3891 | static void prune_unused_types_mark (dw_die_ref, int); | |
3892 | static void prune_unused_types_walk (dw_die_ref); | |
3893 | static void prune_unused_types_walk_attribs (dw_die_ref); | |
3894 | static void prune_unused_types_prune (dw_die_ref); | |
3895 | static void prune_unused_types (void); | |
3896 | static int maybe_emit_file (int); | |
73c68f61 | 3897 | |
7d9d8943 AM |
3898 | /* Section names used to hold DWARF debugging information. */ |
3899 | #ifndef DEBUG_INFO_SECTION | |
3900 | #define DEBUG_INFO_SECTION ".debug_info" | |
3901 | #endif | |
9d2f2c45 RH |
3902 | #ifndef DEBUG_ABBREV_SECTION |
3903 | #define DEBUG_ABBREV_SECTION ".debug_abbrev" | |
7d9d8943 | 3904 | #endif |
9d2f2c45 RH |
3905 | #ifndef DEBUG_ARANGES_SECTION |
3906 | #define DEBUG_ARANGES_SECTION ".debug_aranges" | |
7d9d8943 | 3907 | #endif |
9d2f2c45 RH |
3908 | #ifndef DEBUG_MACINFO_SECTION |
3909 | #define DEBUG_MACINFO_SECTION ".debug_macinfo" | |
7d9d8943 AM |
3910 | #endif |
3911 | #ifndef DEBUG_LINE_SECTION | |
3912 | #define DEBUG_LINE_SECTION ".debug_line" | |
3913 | #endif | |
9d2f2c45 RH |
3914 | #ifndef DEBUG_LOC_SECTION |
3915 | #define DEBUG_LOC_SECTION ".debug_loc" | |
7d9d8943 | 3916 | #endif |
9d2f2c45 RH |
3917 | #ifndef DEBUG_PUBNAMES_SECTION |
3918 | #define DEBUG_PUBNAMES_SECTION ".debug_pubnames" | |
7d9d8943 | 3919 | #endif |
9d2f2c45 RH |
3920 | #ifndef DEBUG_STR_SECTION |
3921 | #define DEBUG_STR_SECTION ".debug_str" | |
7d9d8943 | 3922 | #endif |
a20612aa RH |
3923 | #ifndef DEBUG_RANGES_SECTION |
3924 | #define DEBUG_RANGES_SECTION ".debug_ranges" | |
3925 | #endif | |
7d9d8943 AM |
3926 | |
3927 | /* Standard ELF section names for compiled code and data. */ | |
f99ffb60 RH |
3928 | #ifndef TEXT_SECTION_NAME |
3929 | #define TEXT_SECTION_NAME ".text" | |
7d9d8943 AM |
3930 | #endif |
3931 | ||
9eb4015a | 3932 | /* Section flags for .debug_str section. */ |
9eb4015a | 3933 | #define DEBUG_STR_SECTION_FLAGS \ |
5d4856a0 | 3934 | (HAVE_GAS_SHF_MERGE && flag_merge_constants \ |
b0c242c0 AM |
3935 | ? SECTION_DEBUG | SECTION_MERGE | SECTION_STRINGS | 1 \ |
3936 | : SECTION_DEBUG) | |
9eb4015a | 3937 | |
7d9d8943 | 3938 | /* Labels we insert at beginning sections we can reference instead of |
556273e0 | 3939 | the section names themselves. */ |
7d9d8943 AM |
3940 | |
3941 | #ifndef TEXT_SECTION_LABEL | |
9d2f2c45 | 3942 | #define TEXT_SECTION_LABEL "Ltext" |
7d9d8943 AM |
3943 | #endif |
3944 | #ifndef DEBUG_LINE_SECTION_LABEL | |
9d2f2c45 | 3945 | #define DEBUG_LINE_SECTION_LABEL "Ldebug_line" |
7d9d8943 AM |
3946 | #endif |
3947 | #ifndef DEBUG_INFO_SECTION_LABEL | |
9d2f2c45 | 3948 | #define DEBUG_INFO_SECTION_LABEL "Ldebug_info" |
7d9d8943 | 3949 | #endif |
9d2f2c45 RH |
3950 | #ifndef DEBUG_ABBREV_SECTION_LABEL |
3951 | #define DEBUG_ABBREV_SECTION_LABEL "Ldebug_abbrev" | |
7d9d8943 | 3952 | #endif |
9d2f2c45 RH |
3953 | #ifndef DEBUG_LOC_SECTION_LABEL |
3954 | #define DEBUG_LOC_SECTION_LABEL "Ldebug_loc" | |
63e46568 | 3955 | #endif |
2bee6045 JJ |
3956 | #ifndef DEBUG_RANGES_SECTION_LABEL |
3957 | #define DEBUG_RANGES_SECTION_LABEL "Ldebug_ranges" | |
3958 | #endif | |
84a5b4f8 DB |
3959 | #ifndef DEBUG_MACINFO_SECTION_LABEL |
3960 | #define DEBUG_MACINFO_SECTION_LABEL "Ldebug_macinfo" | |
3961 | #endif | |
a20612aa | 3962 | |
7d9d8943 AM |
3963 | /* Definitions of defaults for formats and names of various special |
3964 | (artificial) labels which may be generated within this file (when the -g | |
def66b10 | 3965 | options is used and DWARF2_DEBUGGING_INFO is in effect. |
7d9d8943 AM |
3966 | If necessary, these may be overridden from within the tm.h file, but |
3967 | typically, overriding these defaults is unnecessary. */ | |
3968 | ||
3969 | static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3970 | static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3971 | static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3972 | static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3973 | static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
84a5b4f8 | 3974 | static char macinfo_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
63e46568 | 3975 | static char loc_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
2bee6045 | 3976 | static char ranges_section_label[2 * MAX_ARTIFICIAL_LABEL_BYTES]; |
2ad9852d | 3977 | |
7d9d8943 AM |
3978 | #ifndef TEXT_END_LABEL |
3979 | #define TEXT_END_LABEL "Letext" | |
3980 | #endif | |
7d9d8943 AM |
3981 | #ifndef BLOCK_BEGIN_LABEL |
3982 | #define BLOCK_BEGIN_LABEL "LBB" | |
3983 | #endif | |
3984 | #ifndef BLOCK_END_LABEL | |
3985 | #define BLOCK_END_LABEL "LBE" | |
3986 | #endif | |
7d9d8943 AM |
3987 | #ifndef LINE_CODE_LABEL |
3988 | #define LINE_CODE_LABEL "LM" | |
3989 | #endif | |
3990 | #ifndef SEPARATE_LINE_CODE_LABEL | |
3991 | #define SEPARATE_LINE_CODE_LABEL "LSM" | |
3992 | #endif | |
3993 | \f | |
3994 | /* We allow a language front-end to designate a function that is to be | |
3995 | called to "demangle" any name before it it put into a DIE. */ | |
3996 | ||
7080f735 | 3997 | static const char *(*demangle_name_func) (const char *); |
7d9d8943 AM |
3998 | |
3999 | void | |
7080f735 | 4000 | dwarf2out_set_demangle_name_func (const char *(*func) (const char *)) |
7d9d8943 AM |
4001 | { |
4002 | demangle_name_func = func; | |
4003 | } | |
7d9d8943 AM |
4004 | |
4005 | /* Test if rtl node points to a pseudo register. */ | |
4006 | ||
4007 | static inline int | |
7080f735 | 4008 | is_pseudo_reg (rtx rtl) |
7d9d8943 AM |
4009 | { |
4010 | return ((GET_CODE (rtl) == REG && REGNO (rtl) >= FIRST_PSEUDO_REGISTER) | |
4011 | || (GET_CODE (rtl) == SUBREG | |
ddef6bc7 | 4012 | && REGNO (SUBREG_REG (rtl)) >= FIRST_PSEUDO_REGISTER)); |
7d9d8943 AM |
4013 | } |
4014 | ||
4015 | /* Return a reference to a type, with its const and volatile qualifiers | |
4016 | removed. */ | |
4017 | ||
4018 | static inline tree | |
7080f735 | 4019 | type_main_variant (tree type) |
7d9d8943 AM |
4020 | { |
4021 | type = TYPE_MAIN_VARIANT (type); | |
4022 | ||
2ad9852d RK |
4023 | /* ??? There really should be only one main variant among any group of |
4024 | variants of a given type (and all of the MAIN_VARIANT values for all | |
4025 | members of the group should point to that one type) but sometimes the C | |
4026 | front-end messes this up for array types, so we work around that bug | |
4027 | here. */ | |
7d9d8943 AM |
4028 | if (TREE_CODE (type) == ARRAY_TYPE) |
4029 | while (type != TYPE_MAIN_VARIANT (type)) | |
4030 | type = TYPE_MAIN_VARIANT (type); | |
4031 | ||
4032 | return type; | |
4033 | } | |
4034 | ||
cc2902df | 4035 | /* Return nonzero if the given type node represents a tagged type. */ |
7d9d8943 AM |
4036 | |
4037 | static inline int | |
7080f735 | 4038 | is_tagged_type (tree type) |
7d9d8943 | 4039 | { |
b3694847 | 4040 | enum tree_code code = TREE_CODE (type); |
7d9d8943 AM |
4041 | |
4042 | return (code == RECORD_TYPE || code == UNION_TYPE | |
4043 | || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE); | |
4044 | } | |
4045 | ||
4046 | /* Convert a DIE tag into its string name. */ | |
4047 | ||
4048 | static const char * | |
7080f735 | 4049 | dwarf_tag_name (unsigned int tag) |
7d9d8943 AM |
4050 | { |
4051 | switch (tag) | |
4052 | { | |
4053 | case DW_TAG_padding: | |
4054 | return "DW_TAG_padding"; | |
4055 | case DW_TAG_array_type: | |
4056 | return "DW_TAG_array_type"; | |
4057 | case DW_TAG_class_type: | |
4058 | return "DW_TAG_class_type"; | |
4059 | case DW_TAG_entry_point: | |
4060 | return "DW_TAG_entry_point"; | |
4061 | case DW_TAG_enumeration_type: | |
4062 | return "DW_TAG_enumeration_type"; | |
4063 | case DW_TAG_formal_parameter: | |
4064 | return "DW_TAG_formal_parameter"; | |
4065 | case DW_TAG_imported_declaration: | |
4066 | return "DW_TAG_imported_declaration"; | |
4067 | case DW_TAG_label: | |
4068 | return "DW_TAG_label"; | |
4069 | case DW_TAG_lexical_block: | |
4070 | return "DW_TAG_lexical_block"; | |
4071 | case DW_TAG_member: | |
4072 | return "DW_TAG_member"; | |
4073 | case DW_TAG_pointer_type: | |
4074 | return "DW_TAG_pointer_type"; | |
4075 | case DW_TAG_reference_type: | |
4076 | return "DW_TAG_reference_type"; | |
4077 | case DW_TAG_compile_unit: | |
4078 | return "DW_TAG_compile_unit"; | |
4079 | case DW_TAG_string_type: | |
4080 | return "DW_TAG_string_type"; | |
4081 | case DW_TAG_structure_type: | |
4082 | return "DW_TAG_structure_type"; | |
4083 | case DW_TAG_subroutine_type: | |
4084 | return "DW_TAG_subroutine_type"; | |
4085 | case DW_TAG_typedef: | |
4086 | return "DW_TAG_typedef"; | |
4087 | case DW_TAG_union_type: | |
4088 | return "DW_TAG_union_type"; | |
4089 | case DW_TAG_unspecified_parameters: | |
4090 | return "DW_TAG_unspecified_parameters"; | |
4091 | case DW_TAG_variant: | |
4092 | return "DW_TAG_variant"; | |
4093 | case DW_TAG_common_block: | |
4094 | return "DW_TAG_common_block"; | |
4095 | case DW_TAG_common_inclusion: | |
4096 | return "DW_TAG_common_inclusion"; | |
4097 | case DW_TAG_inheritance: | |
4098 | return "DW_TAG_inheritance"; | |
4099 | case DW_TAG_inlined_subroutine: | |
4100 | return "DW_TAG_inlined_subroutine"; | |
4101 | case DW_TAG_module: | |
4102 | return "DW_TAG_module"; | |
4103 | case DW_TAG_ptr_to_member_type: | |
4104 | return "DW_TAG_ptr_to_member_type"; | |
4105 | case DW_TAG_set_type: | |
4106 | return "DW_TAG_set_type"; | |
4107 | case DW_TAG_subrange_type: | |
4108 | return "DW_TAG_subrange_type"; | |
4109 | case DW_TAG_with_stmt: | |
4110 | return "DW_TAG_with_stmt"; | |
4111 | case DW_TAG_access_declaration: | |
4112 | return "DW_TAG_access_declaration"; | |
4113 | case DW_TAG_base_type: | |
4114 | return "DW_TAG_base_type"; | |
4115 | case DW_TAG_catch_block: | |
4116 | return "DW_TAG_catch_block"; | |
4117 | case DW_TAG_const_type: | |
4118 | return "DW_TAG_const_type"; | |
4119 | case DW_TAG_constant: | |
4120 | return "DW_TAG_constant"; | |
4121 | case DW_TAG_enumerator: | |
4122 | return "DW_TAG_enumerator"; | |
4123 | case DW_TAG_file_type: | |
4124 | return "DW_TAG_file_type"; | |
4125 | case DW_TAG_friend: | |
4126 | return "DW_TAG_friend"; | |
4127 | case DW_TAG_namelist: | |
4128 | return "DW_TAG_namelist"; | |
4129 | case DW_TAG_namelist_item: | |
4130 | return "DW_TAG_namelist_item"; | |
66c78aa9 JM |
4131 | case DW_TAG_namespace: |
4132 | return "DW_TAG_namespace"; | |
7d9d8943 AM |
4133 | case DW_TAG_packed_type: |
4134 | return "DW_TAG_packed_type"; | |
4135 | case DW_TAG_subprogram: | |
4136 | return "DW_TAG_subprogram"; | |
4137 | case DW_TAG_template_type_param: | |
4138 | return "DW_TAG_template_type_param"; | |
4139 | case DW_TAG_template_value_param: | |
4140 | return "DW_TAG_template_value_param"; | |
4141 | case DW_TAG_thrown_type: | |
4142 | return "DW_TAG_thrown_type"; | |
4143 | case DW_TAG_try_block: | |
4144 | return "DW_TAG_try_block"; | |
4145 | case DW_TAG_variant_part: | |
4146 | return "DW_TAG_variant_part"; | |
4147 | case DW_TAG_variable: | |
4148 | return "DW_TAG_variable"; | |
4149 | case DW_TAG_volatile_type: | |
4150 | return "DW_TAG_volatile_type"; | |
6097b0c3 DP |
4151 | case DW_TAG_imported_module: |
4152 | return "DW_TAG_imported_module"; | |
7d9d8943 AM |
4153 | case DW_TAG_MIPS_loop: |
4154 | return "DW_TAG_MIPS_loop"; | |
4155 | case DW_TAG_format_label: | |
4156 | return "DW_TAG_format_label"; | |
4157 | case DW_TAG_function_template: | |
4158 | return "DW_TAG_function_template"; | |
4159 | case DW_TAG_class_template: | |
4160 | return "DW_TAG_class_template"; | |
881c6935 JM |
4161 | case DW_TAG_GNU_BINCL: |
4162 | return "DW_TAG_GNU_BINCL"; | |
4163 | case DW_TAG_GNU_EINCL: | |
4164 | return "DW_TAG_GNU_EINCL"; | |
7d9d8943 AM |
4165 | default: |
4166 | return "DW_TAG_<unknown>"; | |
4167 | } | |
4168 | } | |
4169 | ||
4170 | /* Convert a DWARF attribute code into its string name. */ | |
4171 | ||
4172 | static const char * | |
7080f735 | 4173 | dwarf_attr_name (unsigned int attr) |
7d9d8943 AM |
4174 | { |
4175 | switch (attr) | |
4176 | { | |
4177 | case DW_AT_sibling: | |
4178 | return "DW_AT_sibling"; | |
4179 | case DW_AT_location: | |
4180 | return "DW_AT_location"; | |
4181 | case DW_AT_name: | |
4182 | return "DW_AT_name"; | |
4183 | case DW_AT_ordering: | |
4184 | return "DW_AT_ordering"; | |
4185 | case DW_AT_subscr_data: | |
4186 | return "DW_AT_subscr_data"; | |
4187 | case DW_AT_byte_size: | |
4188 | return "DW_AT_byte_size"; | |
4189 | case DW_AT_bit_offset: | |
4190 | return "DW_AT_bit_offset"; | |
4191 | case DW_AT_bit_size: | |
4192 | return "DW_AT_bit_size"; | |
4193 | case DW_AT_element_list: | |
4194 | return "DW_AT_element_list"; | |
4195 | case DW_AT_stmt_list: | |
4196 | return "DW_AT_stmt_list"; | |
4197 | case DW_AT_low_pc: | |
4198 | return "DW_AT_low_pc"; | |
4199 | case DW_AT_high_pc: | |
4200 | return "DW_AT_high_pc"; | |
4201 | case DW_AT_language: | |
4202 | return "DW_AT_language"; | |
4203 | case DW_AT_member: | |
4204 | return "DW_AT_member"; | |
4205 | case DW_AT_discr: | |
4206 | return "DW_AT_discr"; | |
4207 | case DW_AT_discr_value: | |
4208 | return "DW_AT_discr_value"; | |
4209 | case DW_AT_visibility: | |
4210 | return "DW_AT_visibility"; | |
4211 | case DW_AT_import: | |
4212 | return "DW_AT_import"; | |
4213 | case DW_AT_string_length: | |
4214 | return "DW_AT_string_length"; | |
4215 | case DW_AT_common_reference: | |
4216 | return "DW_AT_common_reference"; | |
4217 | case DW_AT_comp_dir: | |
4218 | return "DW_AT_comp_dir"; | |
4219 | case DW_AT_const_value: | |
4220 | return "DW_AT_const_value"; | |
4221 | case DW_AT_containing_type: | |
4222 | return "DW_AT_containing_type"; | |
4223 | case DW_AT_default_value: | |
4224 | return "DW_AT_default_value"; | |
4225 | case DW_AT_inline: | |
4226 | return "DW_AT_inline"; | |
4227 | case DW_AT_is_optional: | |
4228 | return "DW_AT_is_optional"; | |
4229 | case DW_AT_lower_bound: | |
4230 | return "DW_AT_lower_bound"; | |
4231 | case DW_AT_producer: | |
4232 | return "DW_AT_producer"; | |
4233 | case DW_AT_prototyped: | |
4234 | return "DW_AT_prototyped"; | |
4235 | case DW_AT_return_addr: | |
4236 | return "DW_AT_return_addr"; | |
4237 | case DW_AT_start_scope: | |
4238 | return "DW_AT_start_scope"; | |
4239 | case DW_AT_stride_size: | |
4240 | return "DW_AT_stride_size"; | |
4241 | case DW_AT_upper_bound: | |
4242 | return "DW_AT_upper_bound"; | |
4243 | case DW_AT_abstract_origin: | |
4244 | return "DW_AT_abstract_origin"; | |
4245 | case DW_AT_accessibility: | |
4246 | return "DW_AT_accessibility"; | |
4247 | case DW_AT_address_class: | |
4248 | return "DW_AT_address_class"; | |
4249 | case DW_AT_artificial: | |
4250 | return "DW_AT_artificial"; | |
4251 | case DW_AT_base_types: | |
4252 | return "DW_AT_base_types"; | |
4253 | case DW_AT_calling_convention: | |
4254 | return "DW_AT_calling_convention"; | |
4255 | case DW_AT_count: | |
4256 | return "DW_AT_count"; | |
4257 | case DW_AT_data_member_location: | |
4258 | return "DW_AT_data_member_location"; | |
4259 | case DW_AT_decl_column: | |
4260 | return "DW_AT_decl_column"; | |
4261 | case DW_AT_decl_file: | |
4262 | return "DW_AT_decl_file"; | |
4263 | case DW_AT_decl_line: | |
4264 | return "DW_AT_decl_line"; | |
4265 | case DW_AT_declaration: | |
4266 | return "DW_AT_declaration"; | |
4267 | case DW_AT_discr_list: | |
4268 | return "DW_AT_discr_list"; | |
4269 | case DW_AT_encoding: | |
4270 | return "DW_AT_encoding"; | |
4271 | case DW_AT_external: | |
4272 | return "DW_AT_external"; | |
4273 | case DW_AT_frame_base: | |
4274 | return "DW_AT_frame_base"; | |
4275 | case DW_AT_friend: | |
4276 | return "DW_AT_friend"; | |
4277 | case DW_AT_identifier_case: | |
4278 | return "DW_AT_identifier_case"; | |
4279 | case DW_AT_macro_info: | |
4280 | return "DW_AT_macro_info"; | |
4281 | case DW_AT_namelist_items: | |
4282 | return "DW_AT_namelist_items"; | |
4283 | case DW_AT_priority: | |
4284 | return "DW_AT_priority"; | |
4285 | case DW_AT_segment: | |
4286 | return "DW_AT_segment"; | |
4287 | case DW_AT_specification: | |
4288 | return "DW_AT_specification"; | |
4289 | case DW_AT_static_link: | |
4290 | return "DW_AT_static_link"; | |
4291 | case DW_AT_type: | |
4292 | return "DW_AT_type"; | |
4293 | case DW_AT_use_location: | |
4294 | return "DW_AT_use_location"; | |
4295 | case DW_AT_variable_parameter: | |
4296 | return "DW_AT_variable_parameter"; | |
4297 | case DW_AT_virtuality: | |
4298 | return "DW_AT_virtuality"; | |
4299 | case DW_AT_vtable_elem_location: | |
4300 | return "DW_AT_vtable_elem_location"; | |
4301 | ||
a20612aa RH |
4302 | case DW_AT_allocated: |
4303 | return "DW_AT_allocated"; | |
4304 | case DW_AT_associated: | |
4305 | return "DW_AT_associated"; | |
4306 | case DW_AT_data_location: | |
4307 | return "DW_AT_data_location"; | |
4308 | case DW_AT_stride: | |
4309 | return "DW_AT_stride"; | |
4310 | case DW_AT_entry_pc: | |
4311 | return "DW_AT_entry_pc"; | |
4312 | case DW_AT_use_UTF8: | |
4313 | return "DW_AT_use_UTF8"; | |
4314 | case DW_AT_extension: | |
4315 | return "DW_AT_extension"; | |
4316 | case DW_AT_ranges: | |
4317 | return "DW_AT_ranges"; | |
4318 | case DW_AT_trampoline: | |
4319 | return "DW_AT_trampoline"; | |
4320 | case DW_AT_call_column: | |
4321 | return "DW_AT_call_column"; | |
4322 | case DW_AT_call_file: | |
4323 | return "DW_AT_call_file"; | |
4324 | case DW_AT_call_line: | |
4325 | return "DW_AT_call_line"; | |
4326 | ||
7d9d8943 AM |
4327 | case DW_AT_MIPS_fde: |
4328 | return "DW_AT_MIPS_fde"; | |
4329 | case DW_AT_MIPS_loop_begin: | |
4330 | return "DW_AT_MIPS_loop_begin"; | |
4331 | case DW_AT_MIPS_tail_loop_begin: | |
4332 | return "DW_AT_MIPS_tail_loop_begin"; | |
4333 | case DW_AT_MIPS_epilog_begin: | |
4334 | return "DW_AT_MIPS_epilog_begin"; | |
4335 | case DW_AT_MIPS_loop_unroll_factor: | |
4336 | return "DW_AT_MIPS_loop_unroll_factor"; | |
4337 | case DW_AT_MIPS_software_pipeline_depth: | |
4338 | return "DW_AT_MIPS_software_pipeline_depth"; | |
4339 | case DW_AT_MIPS_linkage_name: | |
4340 | return "DW_AT_MIPS_linkage_name"; | |
4341 | case DW_AT_MIPS_stride: | |
4342 | return "DW_AT_MIPS_stride"; | |
4343 | case DW_AT_MIPS_abstract_name: | |
4344 | return "DW_AT_MIPS_abstract_name"; | |
4345 | case DW_AT_MIPS_clone_origin: | |
4346 | return "DW_AT_MIPS_clone_origin"; | |
4347 | case DW_AT_MIPS_has_inlines: | |
4348 | return "DW_AT_MIPS_has_inlines"; | |
4349 | ||
4350 | case DW_AT_sf_names: | |
4351 | return "DW_AT_sf_names"; | |
4352 | case DW_AT_src_info: | |
4353 | return "DW_AT_src_info"; | |
4354 | case DW_AT_mac_info: | |
4355 | return "DW_AT_mac_info"; | |
4356 | case DW_AT_src_coords: | |
4357 | return "DW_AT_src_coords"; | |
4358 | case DW_AT_body_begin: | |
4359 | return "DW_AT_body_begin"; | |
4360 | case DW_AT_body_end: | |
4361 | return "DW_AT_body_end"; | |
84f0ace0 JM |
4362 | case DW_AT_GNU_vector: |
4363 | return "DW_AT_GNU_vector"; | |
4364 | ||
7a0c8d71 DR |
4365 | case DW_AT_VMS_rtnbeg_pd_address: |
4366 | return "DW_AT_VMS_rtnbeg_pd_address"; | |
4367 | ||
7d9d8943 AM |
4368 | default: |
4369 | return "DW_AT_<unknown>"; | |
4370 | } | |
4371 | } | |
4372 | ||
4373 | /* Convert a DWARF value form code into its string name. */ | |
4374 | ||
4375 | static const char * | |
7080f735 | 4376 | dwarf_form_name (unsigned int form) |
7d9d8943 AM |
4377 | { |
4378 | switch (form) | |
4379 | { | |
4380 | case DW_FORM_addr: | |
4381 | return "DW_FORM_addr"; | |
4382 | case DW_FORM_block2: | |
4383 | return "DW_FORM_block2"; | |
4384 | case DW_FORM_block4: | |
4385 | return "DW_FORM_block4"; | |
4386 | case DW_FORM_data2: | |
4387 | return "DW_FORM_data2"; | |
4388 | case DW_FORM_data4: | |
4389 | return "DW_FORM_data4"; | |
4390 | case DW_FORM_data8: | |
4391 | return "DW_FORM_data8"; | |
4392 | case DW_FORM_string: | |
4393 | return "DW_FORM_string"; | |
4394 | case DW_FORM_block: | |
4395 | return "DW_FORM_block"; | |
4396 | case DW_FORM_block1: | |
4397 | return "DW_FORM_block1"; | |
4398 | case DW_FORM_data1: | |
4399 | return "DW_FORM_data1"; | |
4400 | case DW_FORM_flag: | |
4401 | return "DW_FORM_flag"; | |
4402 | case DW_FORM_sdata: | |
4403 | return "DW_FORM_sdata"; | |
4404 | case DW_FORM_strp: | |
4405 | return "DW_FORM_strp"; | |
4406 | case DW_FORM_udata: | |
4407 | return "DW_FORM_udata"; | |
4408 | case DW_FORM_ref_addr: | |
4409 | return "DW_FORM_ref_addr"; | |
4410 | case DW_FORM_ref1: | |
4411 | return "DW_FORM_ref1"; | |
4412 | case DW_FORM_ref2: | |
4413 | return "DW_FORM_ref2"; | |
4414 | case DW_FORM_ref4: | |
4415 | return "DW_FORM_ref4"; | |
4416 | case DW_FORM_ref8: | |
4417 | return "DW_FORM_ref8"; | |
4418 | case DW_FORM_ref_udata: | |
4419 | return "DW_FORM_ref_udata"; | |
4420 | case DW_FORM_indirect: | |
4421 | return "DW_FORM_indirect"; | |
3f76745e | 4422 | default: |
7d9d8943 | 4423 | return "DW_FORM_<unknown>"; |
a3f97cbb JW |
4424 | } |
4425 | } | |
4426 | ||
3f76745e | 4427 | /* Convert a DWARF type code into its string name. */ |
71dfc51f | 4428 | |
487a6e06 | 4429 | #if 0 |
d560ee52 | 4430 | static const char * |
7080f735 | 4431 | dwarf_type_encoding_name (unsigned enc) |
a3f97cbb | 4432 | { |
3f76745e | 4433 | switch (enc) |
a3f97cbb | 4434 | { |
3f76745e JM |
4435 | case DW_ATE_address: |
4436 | return "DW_ATE_address"; | |
4437 | case DW_ATE_boolean: | |
4438 | return "DW_ATE_boolean"; | |
4439 | case DW_ATE_complex_float: | |
4440 | return "DW_ATE_complex_float"; | |
4441 | case DW_ATE_float: | |
4442 | return "DW_ATE_float"; | |
4443 | case DW_ATE_signed: | |
4444 | return "DW_ATE_signed"; | |
4445 | case DW_ATE_signed_char: | |
4446 | return "DW_ATE_signed_char"; | |
4447 | case DW_ATE_unsigned: | |
4448 | return "DW_ATE_unsigned"; | |
4449 | case DW_ATE_unsigned_char: | |
4450 | return "DW_ATE_unsigned_char"; | |
4451 | default: | |
4452 | return "DW_ATE_<unknown>"; | |
4453 | } | |
a3f97cbb | 4454 | } |
487a6e06 | 4455 | #endif |
3f76745e JM |
4456 | \f |
4457 | /* Determine the "ultimate origin" of a decl. The decl may be an inlined | |
4458 | instance of an inlined instance of a decl which is local to an inline | |
4459 | function, so we have to trace all of the way back through the origin chain | |
4460 | to find out what sort of node actually served as the original seed for the | |
4461 | given block. */ | |
a3f97cbb | 4462 | |
3f76745e | 4463 | static tree |
7080f735 | 4464 | decl_ultimate_origin (tree decl) |
a3f97cbb | 4465 | { |
10a11b75 JM |
4466 | /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the |
4467 | nodes in the function to point to themselves; ignore that if | |
4468 | we're trying to output the abstract instance of this function. */ | |
4469 | if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl) | |
4470 | return NULL_TREE; | |
4471 | ||
556273e0 | 4472 | #ifdef ENABLE_CHECKING |
02e24c7a MM |
4473 | if (DECL_FROM_INLINE (DECL_ORIGIN (decl))) |
4474 | /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the | |
4475 | most distant ancestor, this should never happen. */ | |
4476 | abort (); | |
4477 | #endif | |
3f76745e | 4478 | |
02e24c7a | 4479 | return DECL_ABSTRACT_ORIGIN (decl); |
a3f97cbb JW |
4480 | } |
4481 | ||
3f76745e JM |
4482 | /* Determine the "ultimate origin" of a block. The block may be an inlined |
4483 | instance of an inlined instance of a block which is local to an inline | |
4484 | function, so we have to trace all of the way back through the origin chain | |
4485 | to find out what sort of node actually served as the original seed for the | |
4486 | given block. */ | |
71dfc51f | 4487 | |
3f76745e | 4488 | static tree |
7080f735 | 4489 | block_ultimate_origin (tree block) |
a3f97cbb | 4490 | { |
b3694847 | 4491 | tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block); |
71dfc51f | 4492 | |
10a11b75 JM |
4493 | /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the |
4494 | nodes in the function to point to themselves; ignore that if | |
4495 | we're trying to output the abstract instance of this function. */ | |
4496 | if (BLOCK_ABSTRACT (block) && immediate_origin == block) | |
4497 | return NULL_TREE; | |
4498 | ||
3f76745e JM |
4499 | if (immediate_origin == NULL_TREE) |
4500 | return NULL_TREE; | |
4501 | else | |
4502 | { | |
b3694847 SS |
4503 | tree ret_val; |
4504 | tree lookahead = immediate_origin; | |
71dfc51f | 4505 | |
3f76745e JM |
4506 | do |
4507 | { | |
4508 | ret_val = lookahead; | |
2ad9852d RK |
4509 | lookahead = (TREE_CODE (ret_val) == BLOCK |
4510 | ? BLOCK_ABSTRACT_ORIGIN (ret_val) : NULL); | |
3f76745e JM |
4511 | } |
4512 | while (lookahead != NULL && lookahead != ret_val); | |
4513 | ||
4514 | return ret_val; | |
4515 | } | |
a3f97cbb JW |
4516 | } |
4517 | ||
3f76745e JM |
4518 | /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT |
4519 | of a virtual function may refer to a base class, so we check the 'this' | |
4520 | parameter. */ | |
71dfc51f | 4521 | |
3f76745e | 4522 | static tree |
7080f735 | 4523 | decl_class_context (tree decl) |
a3f97cbb | 4524 | { |
3f76745e | 4525 | tree context = NULL_TREE; |
71dfc51f | 4526 | |
3f76745e JM |
4527 | if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl)) |
4528 | context = DECL_CONTEXT (decl); | |
4529 | else | |
4530 | context = TYPE_MAIN_VARIANT | |
4531 | (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))))); | |
71dfc51f | 4532 | |
2f939d94 | 4533 | if (context && !TYPE_P (context)) |
3f76745e JM |
4534 | context = NULL_TREE; |
4535 | ||
4536 | return context; | |
a3f97cbb JW |
4537 | } |
4538 | \f | |
a96c67ec | 4539 | /* Add an attribute/value pair to a DIE. We build the lists up in reverse |
881c6935 | 4540 | addition order, and correct that in reverse_all_dies. */ |
71dfc51f RK |
4541 | |
4542 | static inline void | |
7080f735 | 4543 | add_dwarf_attr (dw_die_ref die, dw_attr_ref attr) |
a3f97cbb | 4544 | { |
3f76745e | 4545 | if (die != NULL && attr != NULL) |
a3f97cbb | 4546 | { |
a96c67ec JM |
4547 | attr->dw_attr_next = die->die_attr; |
4548 | die->die_attr = attr; | |
a3f97cbb JW |
4549 | } |
4550 | } | |
4551 | ||
17211ab5 | 4552 | static inline enum dw_val_class |
7080f735 | 4553 | AT_class (dw_attr_ref a) |
a96c67ec JM |
4554 | { |
4555 | return a->dw_attr_val.val_class; | |
4556 | } | |
4557 | ||
3f76745e | 4558 | /* Add a flag value attribute to a DIE. */ |
71dfc51f | 4559 | |
3f76745e | 4560 | static inline void |
7080f735 | 4561 | add_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int flag) |
a3f97cbb | 4562 | { |
703ad42b | 4563 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4564 | |
3f76745e JM |
4565 | attr->dw_attr_next = NULL; |
4566 | attr->dw_attr = attr_kind; | |
4567 | attr->dw_attr_val.val_class = dw_val_class_flag; | |
4568 | attr->dw_attr_val.v.val_flag = flag; | |
4569 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4570 | } |
4571 | ||
a96c67ec | 4572 | static inline unsigned |
7080f735 | 4573 | AT_flag (dw_attr_ref a) |
a96c67ec JM |
4574 | { |
4575 | if (a && AT_class (a) == dw_val_class_flag) | |
4576 | return a->dw_attr_val.v.val_flag; | |
4577 | ||
40e8cc95 | 4578 | abort (); |
a96c67ec JM |
4579 | } |
4580 | ||
3f76745e | 4581 | /* Add a signed integer attribute value to a DIE. */ |
71dfc51f | 4582 | |
3f76745e | 4583 | static inline void |
799f628a | 4584 | add_AT_int (dw_die_ref die, enum dwarf_attribute attr_kind, HOST_WIDE_INT int_val) |
a3f97cbb | 4585 | { |
703ad42b | 4586 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
3f76745e JM |
4587 | |
4588 | attr->dw_attr_next = NULL; | |
4589 | attr->dw_attr = attr_kind; | |
4590 | attr->dw_attr_val.val_class = dw_val_class_const; | |
4591 | attr->dw_attr_val.v.val_int = int_val; | |
4592 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4593 | } |
4594 | ||
799f628a | 4595 | static inline HOST_WIDE_INT |
7080f735 | 4596 | AT_int (dw_attr_ref a) |
a96c67ec JM |
4597 | { |
4598 | if (a && AT_class (a) == dw_val_class_const) | |
4599 | return a->dw_attr_val.v.val_int; | |
4600 | ||
40e8cc95 | 4601 | abort (); |
a96c67ec JM |
4602 | } |
4603 | ||
3f76745e | 4604 | /* Add an unsigned integer attribute value to a DIE. */ |
71dfc51f | 4605 | |
3f76745e | 4606 | static inline void |
7080f735 | 4607 | add_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind, |
799f628a | 4608 | unsigned HOST_WIDE_INT unsigned_val) |
a3f97cbb | 4609 | { |
703ad42b | 4610 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
3f76745e JM |
4611 | |
4612 | attr->dw_attr_next = NULL; | |
4613 | attr->dw_attr = attr_kind; | |
4614 | attr->dw_attr_val.val_class = dw_val_class_unsigned_const; | |
4615 | attr->dw_attr_val.v.val_unsigned = unsigned_val; | |
4616 | add_dwarf_attr (die, attr); | |
a3f97cbb | 4617 | } |
71dfc51f | 4618 | |
799f628a | 4619 | static inline unsigned HOST_WIDE_INT |
7080f735 | 4620 | AT_unsigned (dw_attr_ref a) |
a96c67ec JM |
4621 | { |
4622 | if (a && AT_class (a) == dw_val_class_unsigned_const) | |
4623 | return a->dw_attr_val.v.val_unsigned; | |
4624 | ||
40e8cc95 | 4625 | abort (); |
a96c67ec JM |
4626 | } |
4627 | ||
3f76745e JM |
4628 | /* Add an unsigned double integer attribute value to a DIE. */ |
4629 | ||
4630 | static inline void | |
7080f735 AJ |
4631 | add_AT_long_long (dw_die_ref die, enum dwarf_attribute attr_kind, |
4632 | long unsigned int val_hi, long unsigned int val_low) | |
a3f97cbb | 4633 | { |
703ad42b | 4634 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4635 | |
3f76745e JM |
4636 | attr->dw_attr_next = NULL; |
4637 | attr->dw_attr = attr_kind; | |
4638 | attr->dw_attr_val.val_class = dw_val_class_long_long; | |
4639 | attr->dw_attr_val.v.val_long_long.hi = val_hi; | |
4640 | attr->dw_attr_val.v.val_long_long.low = val_low; | |
4641 | add_dwarf_attr (die, attr); | |
4642 | } | |
71dfc51f | 4643 | |
3f76745e | 4644 | /* Add a floating point attribute value to a DIE and return it. */ |
71dfc51f | 4645 | |
3f76745e | 4646 | static inline void |
e7ee3914 AM |
4647 | add_AT_vec (dw_die_ref die, enum dwarf_attribute attr_kind, |
4648 | unsigned int length, unsigned int elt_size, unsigned char *array) | |
3f76745e | 4649 | { |
703ad42b | 4650 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
3f76745e JM |
4651 | |
4652 | attr->dw_attr_next = NULL; | |
4653 | attr->dw_attr = attr_kind; | |
e7ee3914 AM |
4654 | attr->dw_attr_val.val_class = dw_val_class_vec; |
4655 | attr->dw_attr_val.v.val_vec.length = length; | |
4656 | attr->dw_attr_val.v.val_vec.elt_size = elt_size; | |
4657 | attr->dw_attr_val.v.val_vec.array = array; | |
3f76745e | 4658 | add_dwarf_attr (die, attr); |
a3f97cbb JW |
4659 | } |
4660 | ||
17211ab5 GK |
4661 | /* Hash and equality functions for debug_str_hash. */ |
4662 | ||
4663 | static hashval_t | |
7080f735 | 4664 | debug_str_do_hash (const void *x) |
17211ab5 GK |
4665 | { |
4666 | return htab_hash_string (((const struct indirect_string_node *)x)->str); | |
4667 | } | |
4668 | ||
4669 | static int | |
7080f735 | 4670 | debug_str_eq (const void *x1, const void *x2) |
17211ab5 GK |
4671 | { |
4672 | return strcmp ((((const struct indirect_string_node *)x1)->str), | |
4673 | (const char *)x2) == 0; | |
4674 | } | |
4675 | ||
3f76745e | 4676 | /* Add a string attribute value to a DIE. */ |
71dfc51f | 4677 | |
3f76745e | 4678 | static inline void |
7080f735 | 4679 | add_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind, const char *str) |
a3f97cbb | 4680 | { |
703ad42b | 4681 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
9eb4015a | 4682 | struct indirect_string_node *node; |
fad205ff | 4683 | void **slot; |
c26fbbca | 4684 | |
9eb4015a | 4685 | if (! debug_str_hash) |
7080f735 | 4686 | debug_str_hash = htab_create_ggc (10, debug_str_do_hash, |
17211ab5 GK |
4687 | debug_str_eq, NULL); |
4688 | ||
4689 | slot = htab_find_slot_with_hash (debug_str_hash, str, | |
4690 | htab_hash_string (str), INSERT); | |
4691 | if (*slot == NULL) | |
4692 | *slot = ggc_alloc_cleared (sizeof (struct indirect_string_node)); | |
4693 | node = (struct indirect_string_node *) *slot; | |
485bad26 | 4694 | node->str = ggc_strdup (str); |
9eb4015a | 4695 | node->refcount++; |
71dfc51f | 4696 | |
3f76745e JM |
4697 | attr->dw_attr_next = NULL; |
4698 | attr->dw_attr = attr_kind; | |
4699 | attr->dw_attr_val.val_class = dw_val_class_str; | |
9eb4015a | 4700 | attr->dw_attr_val.v.val_str = node; |
3f76745e JM |
4701 | add_dwarf_attr (die, attr); |
4702 | } | |
71dfc51f | 4703 | |
a96c67ec | 4704 | static inline const char * |
7080f735 | 4705 | AT_string (dw_attr_ref a) |
a96c67ec JM |
4706 | { |
4707 | if (a && AT_class (a) == dw_val_class_str) | |
17211ab5 | 4708 | return a->dw_attr_val.v.val_str->str; |
9eb4015a JJ |
4709 | |
4710 | abort (); | |
4711 | } | |
4712 | ||
4713 | /* Find out whether a string should be output inline in DIE | |
4714 | or out-of-line in .debug_str section. */ | |
4715 | ||
9eb4015a | 4716 | static int |
7080f735 | 4717 | AT_string_form (dw_attr_ref a) |
9eb4015a JJ |
4718 | { |
4719 | if (a && AT_class (a) == dw_val_class_str) | |
4720 | { | |
4721 | struct indirect_string_node *node; | |
4722 | unsigned int len; | |
9eb4015a JJ |
4723 | char label[32]; |
4724 | ||
4725 | node = a->dw_attr_val.v.val_str; | |
4726 | if (node->form) | |
4727 | return node->form; | |
4728 | ||
17211ab5 | 4729 | len = strlen (node->str) + 1; |
9eb4015a | 4730 | |
2ad9852d RK |
4731 | /* If the string is shorter or equal to the size of the reference, it is |
4732 | always better to put it inline. */ | |
9eb4015a JJ |
4733 | if (len <= DWARF_OFFSET_SIZE || node->refcount == 0) |
4734 | return node->form = DW_FORM_string; | |
4735 | ||
2ad9852d RK |
4736 | /* If we cannot expect the linker to merge strings in .debug_str |
4737 | section, only put it into .debug_str if it is worth even in this | |
4738 | single module. */ | |
4739 | if ((DEBUG_STR_SECTION_FLAGS & SECTION_MERGE) == 0 | |
4740 | && (len - DWARF_OFFSET_SIZE) * node->refcount <= len) | |
4741 | return node->form = DW_FORM_string; | |
9eb4015a | 4742 | |
17211ab5 GK |
4743 | ASM_GENERATE_INTERNAL_LABEL (label, "LASF", dw2_string_counter); |
4744 | ++dw2_string_counter; | |
9eb4015a | 4745 | node->label = xstrdup (label); |
2ad9852d | 4746 | |
9eb4015a JJ |
4747 | return node->form = DW_FORM_strp; |
4748 | } | |
a96c67ec | 4749 | |
40e8cc95 | 4750 | abort (); |
a96c67ec JM |
4751 | } |
4752 | ||
3f76745e | 4753 | /* Add a DIE reference attribute value to a DIE. */ |
71dfc51f | 4754 | |
3f76745e | 4755 | static inline void |
7080f735 | 4756 | add_AT_die_ref (dw_die_ref die, enum dwarf_attribute attr_kind, dw_die_ref targ_die) |
3f76745e | 4757 | { |
703ad42b | 4758 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4759 | |
3f76745e JM |
4760 | attr->dw_attr_next = NULL; |
4761 | attr->dw_attr = attr_kind; | |
4762 | attr->dw_attr_val.val_class = dw_val_class_die_ref; | |
881c6935 JM |
4763 | attr->dw_attr_val.v.val_die_ref.die = targ_die; |
4764 | attr->dw_attr_val.v.val_die_ref.external = 0; | |
3f76745e JM |
4765 | add_dwarf_attr (die, attr); |
4766 | } | |
b1ccbc24 | 4767 | |
47fcfa7b | 4768 | /* Add an AT_specification attribute to a DIE, and also make the back |
6614fd40 | 4769 | pointer from the specification to the definition. */ |
47fcfa7b SS |
4770 | |
4771 | static inline void | |
4772 | add_AT_specification (dw_die_ref die, dw_die_ref targ_die) | |
4773 | { | |
4774 | add_AT_die_ref (die, DW_AT_specification, targ_die); | |
4775 | if (targ_die->die_definition) | |
4776 | abort (); | |
4777 | targ_die->die_definition = die; | |
4778 | } | |
4779 | ||
a96c67ec | 4780 | static inline dw_die_ref |
7080f735 | 4781 | AT_ref (dw_attr_ref a) |
a96c67ec JM |
4782 | { |
4783 | if (a && AT_class (a) == dw_val_class_die_ref) | |
881c6935 | 4784 | return a->dw_attr_val.v.val_die_ref.die; |
a96c67ec | 4785 | |
40e8cc95 | 4786 | abort (); |
a96c67ec JM |
4787 | } |
4788 | ||
881c6935 | 4789 | static inline int |
7080f735 | 4790 | AT_ref_external (dw_attr_ref a) |
881c6935 JM |
4791 | { |
4792 | if (a && AT_class (a) == dw_val_class_die_ref) | |
4793 | return a->dw_attr_val.v.val_die_ref.external; | |
4794 | ||
4795 | return 0; | |
4796 | } | |
4797 | ||
881c6935 | 4798 | static inline void |
7080f735 | 4799 | set_AT_ref_external (dw_attr_ref a, int i) |
881c6935 JM |
4800 | { |
4801 | if (a && AT_class (a) == dw_val_class_die_ref) | |
4802 | a->dw_attr_val.v.val_die_ref.external = i; | |
4803 | else | |
4804 | abort (); | |
4805 | } | |
4806 | ||
3f76745e | 4807 | /* Add an FDE reference attribute value to a DIE. */ |
b1ccbc24 | 4808 | |
3f76745e | 4809 | static inline void |
7080f735 | 4810 | add_AT_fde_ref (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int targ_fde) |
3f76745e | 4811 | { |
703ad42b | 4812 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
b1ccbc24 | 4813 | |
3f76745e JM |
4814 | attr->dw_attr_next = NULL; |
4815 | attr->dw_attr = attr_kind; | |
4816 | attr->dw_attr_val.val_class = dw_val_class_fde_ref; | |
4817 | attr->dw_attr_val.v.val_fde_index = targ_fde; | |
4818 | add_dwarf_attr (die, attr); | |
a3f97cbb | 4819 | } |
71dfc51f | 4820 | |
3f76745e | 4821 | /* Add a location description attribute value to a DIE. */ |
71dfc51f | 4822 | |
3f76745e | 4823 | static inline void |
7080f735 | 4824 | add_AT_loc (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_descr_ref loc) |
3f76745e | 4825 | { |
703ad42b | 4826 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4827 | |
3f76745e JM |
4828 | attr->dw_attr_next = NULL; |
4829 | attr->dw_attr = attr_kind; | |
4830 | attr->dw_attr_val.val_class = dw_val_class_loc; | |
4831 | attr->dw_attr_val.v.val_loc = loc; | |
4832 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4833 | } |
4834 | ||
a96c67ec | 4835 | static inline dw_loc_descr_ref |
7080f735 | 4836 | AT_loc (dw_attr_ref a) |
a96c67ec JM |
4837 | { |
4838 | if (a && AT_class (a) == dw_val_class_loc) | |
4839 | return a->dw_attr_val.v.val_loc; | |
4840 | ||
40e8cc95 | 4841 | abort (); |
a96c67ec JM |
4842 | } |
4843 | ||
63e46568 | 4844 | static inline void |
7080f735 | 4845 | add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref loc_list) |
63e46568 | 4846 | { |
703ad42b | 4847 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
63e46568 DB |
4848 | |
4849 | attr->dw_attr_next = NULL; | |
4850 | attr->dw_attr = attr_kind; | |
4851 | attr->dw_attr_val.val_class = dw_val_class_loc_list; | |
4852 | attr->dw_attr_val.v.val_loc_list = loc_list; | |
4853 | add_dwarf_attr (die, attr); | |
4854 | have_location_lists = 1; | |
4855 | } | |
4856 | ||
63e46568 | 4857 | static inline dw_loc_list_ref |
7080f735 | 4858 | AT_loc_list (dw_attr_ref a) |
63e46568 DB |
4859 | { |
4860 | if (a && AT_class (a) == dw_val_class_loc_list) | |
4861 | return a->dw_attr_val.v.val_loc_list; | |
4862 | ||
4863 | abort (); | |
4864 | } | |
4865 | ||
3f76745e | 4866 | /* Add an address constant attribute value to a DIE. */ |
71dfc51f | 4867 | |
3f76745e | 4868 | static inline void |
7080f735 | 4869 | add_AT_addr (dw_die_ref die, enum dwarf_attribute attr_kind, rtx addr) |
a3f97cbb | 4870 | { |
703ad42b | 4871 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4872 | |
3f76745e JM |
4873 | attr->dw_attr_next = NULL; |
4874 | attr->dw_attr = attr_kind; | |
4875 | attr->dw_attr_val.val_class = dw_val_class_addr; | |
4876 | attr->dw_attr_val.v.val_addr = addr; | |
4877 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4878 | } |
4879 | ||
1865dbb5 | 4880 | static inline rtx |
7080f735 | 4881 | AT_addr (dw_attr_ref a) |
a96c67ec JM |
4882 | { |
4883 | if (a && AT_class (a) == dw_val_class_addr) | |
4884 | return a->dw_attr_val.v.val_addr; | |
4885 | ||
40e8cc95 | 4886 | abort (); |
a96c67ec JM |
4887 | } |
4888 | ||
3f76745e | 4889 | /* Add a label identifier attribute value to a DIE. */ |
71dfc51f | 4890 | |
3f76745e | 4891 | static inline void |
7080f735 | 4892 | add_AT_lbl_id (dw_die_ref die, enum dwarf_attribute attr_kind, const char *lbl_id) |
a3f97cbb | 4893 | { |
703ad42b | 4894 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4895 | |
3f76745e JM |
4896 | attr->dw_attr_next = NULL; |
4897 | attr->dw_attr = attr_kind; | |
4898 | attr->dw_attr_val.val_class = dw_val_class_lbl_id; | |
4899 | attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id); | |
4900 | add_dwarf_attr (die, attr); | |
4901 | } | |
71dfc51f | 4902 | |
3f76745e JM |
4903 | /* Add a section offset attribute value to a DIE. */ |
4904 | ||
4905 | static inline void | |
7080f735 | 4906 | add_AT_lbl_offset (dw_die_ref die, enum dwarf_attribute attr_kind, const char *label) |
3f76745e | 4907 | { |
703ad42b | 4908 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
71dfc51f | 4909 | |
3f76745e JM |
4910 | attr->dw_attr_next = NULL; |
4911 | attr->dw_attr = attr_kind; | |
8b790721 | 4912 | attr->dw_attr_val.val_class = dw_val_class_lbl_offset; |
a96c67ec | 4913 | attr->dw_attr_val.v.val_lbl_id = xstrdup (label); |
3f76745e | 4914 | add_dwarf_attr (die, attr); |
a3f97cbb JW |
4915 | } |
4916 | ||
a20612aa RH |
4917 | /* Add an offset attribute value to a DIE. */ |
4918 | ||
2bee6045 | 4919 | static inline void |
799f628a JH |
4920 | add_AT_offset (dw_die_ref die, enum dwarf_attribute attr_kind, |
4921 | unsigned HOST_WIDE_INT offset) | |
a20612aa | 4922 | { |
703ad42b | 4923 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
a20612aa RH |
4924 | |
4925 | attr->dw_attr_next = NULL; | |
4926 | attr->dw_attr = attr_kind; | |
4927 | attr->dw_attr_val.val_class = dw_val_class_offset; | |
4928 | attr->dw_attr_val.v.val_offset = offset; | |
4929 | add_dwarf_attr (die, attr); | |
4930 | } | |
4931 | ||
2bee6045 JJ |
4932 | /* Add an range_list attribute value to a DIE. */ |
4933 | ||
4934 | static void | |
7080f735 AJ |
4935 | add_AT_range_list (dw_die_ref die, enum dwarf_attribute attr_kind, |
4936 | long unsigned int offset) | |
2bee6045 | 4937 | { |
703ad42b | 4938 | dw_attr_ref attr = ggc_alloc (sizeof (dw_attr_node)); |
2bee6045 JJ |
4939 | |
4940 | attr->dw_attr_next = NULL; | |
4941 | attr->dw_attr = attr_kind; | |
4942 | attr->dw_attr_val.val_class = dw_val_class_range_list; | |
4943 | attr->dw_attr_val.v.val_offset = offset; | |
4944 | add_dwarf_attr (die, attr); | |
4945 | } | |
4946 | ||
a96c67ec | 4947 | static inline const char * |
7080f735 | 4948 | AT_lbl (dw_attr_ref a) |
a3f97cbb | 4949 | { |
a96c67ec JM |
4950 | if (a && (AT_class (a) == dw_val_class_lbl_id |
4951 | || AT_class (a) == dw_val_class_lbl_offset)) | |
4952 | return a->dw_attr_val.v.val_lbl_id; | |
71dfc51f | 4953 | |
40e8cc95 | 4954 | abort (); |
a3f97cbb JW |
4955 | } |
4956 | ||
3f76745e | 4957 | /* Get the attribute of type attr_kind. */ |
71dfc51f | 4958 | |
965514bd | 4959 | static dw_attr_ref |
7080f735 | 4960 | get_AT (dw_die_ref die, enum dwarf_attribute attr_kind) |
f37230f0 | 4961 | { |
b3694847 SS |
4962 | dw_attr_ref a; |
4963 | dw_die_ref spec = NULL; | |
556273e0 | 4964 | |
3f76745e JM |
4965 | if (die != NULL) |
4966 | { | |
4967 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) | |
2ad9852d RK |
4968 | if (a->dw_attr == attr_kind) |
4969 | return a; | |
4970 | else if (a->dw_attr == DW_AT_specification | |
4971 | || a->dw_attr == DW_AT_abstract_origin) | |
4972 | spec = AT_ref (a); | |
71dfc51f | 4973 | |
3f76745e JM |
4974 | if (spec) |
4975 | return get_AT (spec, attr_kind); | |
4976 | } | |
4977 | ||
4978 | return NULL; | |
f37230f0 JM |
4979 | } |
4980 | ||
2ad9852d RK |
4981 | /* Return the "low pc" attribute value, typically associated with a subprogram |
4982 | DIE. Return null if the "low pc" attribute is either not present, or if it | |
4983 | cannot be represented as an assembler label identifier. */ | |
71dfc51f | 4984 | |
a96c67ec | 4985 | static inline const char * |
7080f735 | 4986 | get_AT_low_pc (dw_die_ref die) |
7e23cb16 | 4987 | { |
b3694847 | 4988 | dw_attr_ref a = get_AT (die, DW_AT_low_pc); |
2ad9852d | 4989 | |
40e8cc95 | 4990 | return a ? AT_lbl (a) : NULL; |
7e23cb16 JM |
4991 | } |
4992 | ||
2ad9852d RK |
4993 | /* Return the "high pc" attribute value, typically associated with a subprogram |
4994 | DIE. Return null if the "high pc" attribute is either not present, or if it | |
4995 | cannot be represented as an assembler label identifier. */ | |
71dfc51f | 4996 | |
a96c67ec | 4997 | static inline const char * |
7080f735 | 4998 | get_AT_hi_pc (dw_die_ref die) |
a3f97cbb | 4999 | { |
b3694847 | 5000 | dw_attr_ref a = get_AT (die, DW_AT_high_pc); |
2ad9852d | 5001 | |
40e8cc95 | 5002 | return a ? AT_lbl (a) : NULL; |
3f76745e JM |
5003 | } |
5004 | ||
5005 | /* Return the value of the string attribute designated by ATTR_KIND, or | |
5006 | NULL if it is not present. */ | |
71dfc51f | 5007 | |
a96c67ec | 5008 | static inline const char * |
7080f735 | 5009 | get_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind) |
3f76745e | 5010 | { |
b3694847 | 5011 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5012 | |
40e8cc95 | 5013 | return a ? AT_string (a) : NULL; |
a3f97cbb JW |
5014 | } |
5015 | ||
3f76745e JM |
5016 | /* Return the value of the flag attribute designated by ATTR_KIND, or -1 |
5017 | if it is not present. */ | |
71dfc51f | 5018 | |
3f76745e | 5019 | static inline int |
7080f735 | 5020 | get_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind) |
a3f97cbb | 5021 | { |
b3694847 | 5022 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5023 | |
40e8cc95 | 5024 | return a ? AT_flag (a) : 0; |
a3f97cbb JW |
5025 | } |
5026 | ||
3f76745e JM |
5027 | /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0 |
5028 | if it is not present. */ | |
71dfc51f | 5029 | |
3f76745e | 5030 | static inline unsigned |
7080f735 | 5031 | get_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind) |
a3f97cbb | 5032 | { |
b3694847 | 5033 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5034 | |
40e8cc95 | 5035 | return a ? AT_unsigned (a) : 0; |
a96c67ec | 5036 | } |
71dfc51f | 5037 | |
a96c67ec | 5038 | static inline dw_die_ref |
7080f735 | 5039 | get_AT_ref (dw_die_ref die, enum dwarf_attribute attr_kind) |
a96c67ec | 5040 | { |
b3694847 | 5041 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5042 | |
40e8cc95 | 5043 | return a ? AT_ref (a) : NULL; |
3f76745e | 5044 | } |
71dfc51f | 5045 | |
c3cdeef4 JB |
5046 | /* Return TRUE if the language is C or C++. */ |
5047 | ||
5048 | static inline bool | |
7080f735 | 5049 | is_c_family (void) |
3f76745e | 5050 | { |
c3cdeef4 | 5051 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
71dfc51f | 5052 | |
3f76745e JM |
5053 | return (lang == DW_LANG_C || lang == DW_LANG_C89 |
5054 | || lang == DW_LANG_C_plus_plus); | |
556273e0 | 5055 | } |
71dfc51f | 5056 | |
c3cdeef4 JB |
5057 | /* Return TRUE if the language is C++. */ |
5058 | ||
5059 | static inline bool | |
7080f735 | 5060 | is_cxx (void) |
1d3d6b1e JM |
5061 | { |
5062 | return (get_AT_unsigned (comp_unit_die, DW_AT_language) | |
5063 | == DW_LANG_C_plus_plus); | |
c26fbbca | 5064 | } |
1d3d6b1e | 5065 | |
c3cdeef4 JB |
5066 | /* Return TRUE if the language is Fortran. */ |
5067 | ||
5068 | static inline bool | |
7080f735 | 5069 | is_fortran (void) |
3f76745e | 5070 | { |
c3cdeef4 | 5071 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
71dfc51f | 5072 | |
6de9cd9a DN |
5073 | return (lang == DW_LANG_Fortran77 |
5074 | || lang == DW_LANG_Fortran90 | |
5075 | || lang == DW_LANG_Fortran95); | |
556273e0 | 5076 | } |
71dfc51f | 5077 | |
c3cdeef4 JB |
5078 | /* Return TRUE if the language is Java. */ |
5079 | ||
5080 | static inline bool | |
7080f735 | 5081 | is_java (void) |
28985b81 | 5082 | { |
c3cdeef4 | 5083 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
28985b81 | 5084 | |
c3cdeef4 JB |
5085 | return lang == DW_LANG_Java; |
5086 | } | |
5087 | ||
5088 | /* Return TRUE if the language is Ada. */ | |
5089 | ||
5090 | static inline bool | |
7080f735 | 5091 | is_ada (void) |
c3cdeef4 JB |
5092 | { |
5093 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); | |
7080f735 | 5094 | |
c3cdeef4 | 5095 | return lang == DW_LANG_Ada95 || lang == DW_LANG_Ada83; |
28985b81 AG |
5096 | } |
5097 | ||
10a11b75 | 5098 | /* Free up the memory used by A. */ |
71dfc51f | 5099 | |
7080f735 | 5100 | static inline void free_AT (dw_attr_ref); |
3f76745e | 5101 | static inline void |
7080f735 | 5102 | free_AT (dw_attr_ref a) |
10a11b75 | 5103 | { |
17211ab5 GK |
5104 | if (AT_class (a) == dw_val_class_str) |
5105 | if (a->dw_attr_val.v.val_str->refcount) | |
5106 | a->dw_attr_val.v.val_str->refcount--; | |
556273e0 | 5107 | } |
10a11b75 JM |
5108 | |
5109 | /* Remove the specified attribute if present. */ | |
5110 | ||
5111 | static void | |
7080f735 | 5112 | remove_AT (dw_die_ref die, enum dwarf_attribute attr_kind) |
3f76745e | 5113 | { |
b3694847 SS |
5114 | dw_attr_ref *p; |
5115 | dw_attr_ref removed = NULL; | |
a3f97cbb | 5116 | |
3f76745e JM |
5117 | if (die != NULL) |
5118 | { | |
a96c67ec JM |
5119 | for (p = &(die->die_attr); *p; p = &((*p)->dw_attr_next)) |
5120 | if ((*p)->dw_attr == attr_kind) | |
5121 | { | |
5122 | removed = *p; | |
5123 | *p = (*p)->dw_attr_next; | |
5124 | break; | |
5125 | } | |
71dfc51f | 5126 | |
a96c67ec | 5127 | if (removed != 0) |
10a11b75 JM |
5128 | free_AT (removed); |
5129 | } | |
5130 | } | |
71dfc51f | 5131 | |
6097b0c3 DP |
5132 | /* Remove child die whose die_tag is specified tag. */ |
5133 | ||
5134 | static void | |
5135 | remove_child_TAG (dw_die_ref die, enum dwarf_tag tag) | |
5136 | { | |
5137 | dw_die_ref current, prev, next; | |
5138 | current = die->die_child; | |
5139 | prev = NULL; | |
5140 | while (current != NULL) | |
5141 | { | |
5142 | if (current->die_tag == tag) | |
5143 | { | |
5144 | next = current->die_sib; | |
5145 | if (prev == NULL) | |
5146 | die->die_child = next; | |
5147 | else | |
5148 | prev->die_sib = next; | |
5149 | free_die (current); | |
5150 | current = next; | |
5151 | } | |
5152 | else | |
5153 | { | |
5154 | prev = current; | |
5155 | current = current->die_sib; | |
5156 | } | |
5157 | } | |
5158 | } | |
5159 | ||
10a11b75 | 5160 | /* Free up the memory used by DIE. */ |
71dfc51f | 5161 | |
10a11b75 | 5162 | static inline void |
7080f735 | 5163 | free_die (dw_die_ref die) |
10a11b75 JM |
5164 | { |
5165 | remove_children (die); | |
3f76745e | 5166 | } |
71dfc51f | 5167 | |
3f76745e | 5168 | /* Discard the children of this DIE. */ |
71dfc51f | 5169 | |
10a11b75 | 5170 | static void |
7080f735 | 5171 | remove_children (dw_die_ref die) |
3f76745e | 5172 | { |
b3694847 | 5173 | dw_die_ref child_die = die->die_child; |
3f76745e JM |
5174 | |
5175 | die->die_child = NULL; | |
3f76745e JM |
5176 | |
5177 | while (child_die != NULL) | |
a3f97cbb | 5178 | { |
b3694847 SS |
5179 | dw_die_ref tmp_die = child_die; |
5180 | dw_attr_ref a; | |
71dfc51f | 5181 | |
3f76745e | 5182 | child_die = child_die->die_sib; |
556273e0 KH |
5183 | |
5184 | for (a = tmp_die->die_attr; a != NULL;) | |
a3f97cbb | 5185 | { |
b3694847 | 5186 | dw_attr_ref tmp_a = a; |
71dfc51f | 5187 | |
3f76745e | 5188 | a = a->dw_attr_next; |
10a11b75 | 5189 | free_AT (tmp_a); |
a3f97cbb | 5190 | } |
71dfc51f | 5191 | |
10a11b75 | 5192 | free_die (tmp_die); |
3f76745e JM |
5193 | } |
5194 | } | |
71dfc51f | 5195 | |
a96c67ec | 5196 | /* Add a child DIE below its parent. We build the lists up in reverse |
881c6935 | 5197 | addition order, and correct that in reverse_all_dies. */ |
71dfc51f | 5198 | |
3f76745e | 5199 | static inline void |
7080f735 | 5200 | add_child_die (dw_die_ref die, dw_die_ref child_die) |
3f76745e JM |
5201 | { |
5202 | if (die != NULL && child_die != NULL) | |
e90b62db | 5203 | { |
3a88cbd1 JL |
5204 | if (die == child_die) |
5205 | abort (); | |
2ad9852d | 5206 | |
3f76745e | 5207 | child_die->die_parent = die; |
a96c67ec JM |
5208 | child_die->die_sib = die->die_child; |
5209 | die->die_child = child_die; | |
3f76745e JM |
5210 | } |
5211 | } | |
5212 | ||
2081603c JM |
5213 | /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT |
5214 | is the specification, to the front of PARENT's list of children. */ | |
10a11b75 JM |
5215 | |
5216 | static void | |
7080f735 | 5217 | splice_child_die (dw_die_ref parent, dw_die_ref child) |
10a11b75 JM |
5218 | { |
5219 | dw_die_ref *p; | |
5220 | ||
5221 | /* We want the declaration DIE from inside the class, not the | |
5222 | specification DIE at toplevel. */ | |
5223 | if (child->die_parent != parent) | |
2081603c JM |
5224 | { |
5225 | dw_die_ref tmp = get_AT_ref (child, DW_AT_specification); | |
2ad9852d | 5226 | |
2081603c JM |
5227 | if (tmp) |
5228 | child = tmp; | |
5229 | } | |
10a11b75 | 5230 | |
2081603c JM |
5231 | if (child->die_parent != parent |
5232 | && child->die_parent != get_AT_ref (parent, DW_AT_specification)) | |
10a11b75 JM |
5233 | abort (); |
5234 | ||
5de0e8d4 | 5235 | for (p = &(child->die_parent->die_child); *p; p = &((*p)->die_sib)) |
10a11b75 JM |
5236 | if (*p == child) |
5237 | { | |
5238 | *p = child->die_sib; | |
5239 | break; | |
5240 | } | |
5241 | ||
73c68f61 | 5242 | child->die_parent = parent; |
10a11b75 JM |
5243 | child->die_sib = parent->die_child; |
5244 | parent->die_child = child; | |
5245 | } | |
5246 | ||
3f76745e JM |
5247 | /* Return a pointer to a newly created DIE node. */ |
5248 | ||
5249 | static inline dw_die_ref | |
7080f735 | 5250 | new_die (enum dwarf_tag tag_value, dw_die_ref parent_die, tree t) |
3f76745e | 5251 | { |
703ad42b | 5252 | dw_die_ref die = ggc_alloc_cleared (sizeof (die_node)); |
3f76745e JM |
5253 | |
5254 | die->die_tag = tag_value; | |
3f76745e JM |
5255 | |
5256 | if (parent_die != NULL) | |
5257 | add_child_die (parent_die, die); | |
5258 | else | |
ef76d03b JW |
5259 | { |
5260 | limbo_die_node *limbo_node; | |
5261 | ||
17211ab5 | 5262 | limbo_node = ggc_alloc_cleared (sizeof (limbo_die_node)); |
ef76d03b | 5263 | limbo_node->die = die; |
54ba1f0d | 5264 | limbo_node->created_for = t; |
ef76d03b JW |
5265 | limbo_node->next = limbo_die_list; |
5266 | limbo_die_list = limbo_node; | |
5267 | } | |
71dfc51f | 5268 | |
3f76745e JM |
5269 | return die; |
5270 | } | |
71dfc51f | 5271 | |
3f76745e | 5272 | /* Return the DIE associated with the given type specifier. */ |
71dfc51f | 5273 | |
3f76745e | 5274 | static inline dw_die_ref |
7080f735 | 5275 | lookup_type_die (tree type) |
3f76745e | 5276 | { |
e2500fed | 5277 | return TYPE_SYMTAB_DIE (type); |
3f76745e | 5278 | } |
e90b62db | 5279 | |
3f76745e | 5280 | /* Equate a DIE to a given type specifier. */ |
71dfc51f | 5281 | |
10a11b75 | 5282 | static inline void |
7080f735 | 5283 | equate_type_number_to_die (tree type, dw_die_ref type_die) |
3f76745e | 5284 | { |
e2500fed | 5285 | TYPE_SYMTAB_DIE (type) = type_die; |
3f76745e | 5286 | } |
71dfc51f | 5287 | |
636c7bc4 JZ |
5288 | /* Returns a hash value for X (which really is a die_struct). */ |
5289 | ||
5290 | static hashval_t | |
5291 | decl_die_table_hash (const void *x) | |
5292 | { | |
5293 | return (hashval_t) ((const dw_die_ref) x)->decl_id; | |
5294 | } | |
5295 | ||
5296 | /* Return nonzero if decl_id of die_struct X is the same as UID of decl *Y. */ | |
5297 | ||
5298 | static int | |
5299 | decl_die_table_eq (const void *x, const void *y) | |
5300 | { | |
5301 | return (((const dw_die_ref) x)->decl_id == DECL_UID ((const tree) y)); | |
5302 | } | |
5303 | ||
3f76745e | 5304 | /* Return the DIE associated with a given declaration. */ |
71dfc51f | 5305 | |
3f76745e | 5306 | static inline dw_die_ref |
7080f735 | 5307 | lookup_decl_die (tree decl) |
3f76745e | 5308 | { |
636c7bc4 | 5309 | return htab_find_with_hash (decl_die_table, decl, DECL_UID (decl)); |
a3f97cbb JW |
5310 | } |
5311 | ||
0a2d3d69 DB |
5312 | /* Returns a hash value for X (which really is a var_loc_list). */ |
5313 | ||
5314 | static hashval_t | |
5315 | decl_loc_table_hash (const void *x) | |
5316 | { | |
5317 | return (hashval_t) ((const var_loc_list *) x)->decl_id; | |
5318 | } | |
5319 | ||
5320 | /* Return nonzero if decl_id of var_loc_list X is the same as | |
5321 | UID of decl *Y. */ | |
5322 | ||
5323 | static int | |
5324 | decl_loc_table_eq (const void *x, const void *y) | |
5325 | { | |
5326 | return (((const var_loc_list *) x)->decl_id == DECL_UID ((const tree) y)); | |
5327 | } | |
5328 | ||
5329 | /* Return the var_loc list associated with a given declaration. */ | |
5330 | ||
5331 | static inline var_loc_list * | |
5332 | lookup_decl_loc (tree decl) | |
5333 | { | |
5334 | return htab_find_with_hash (decl_loc_table, decl, DECL_UID (decl)); | |
5335 | } | |
5336 | ||
3f76745e | 5337 | /* Equate a DIE to a particular declaration. */ |
71dfc51f | 5338 | |
3f76745e | 5339 | static void |
7080f735 | 5340 | equate_decl_number_to_die (tree decl, dw_die_ref decl_die) |
a3f97cbb | 5341 | { |
aea9695c | 5342 | unsigned int decl_id = DECL_UID (decl); |
636c7bc4 | 5343 | void **slot; |
3f76745e | 5344 | |
636c7bc4 JZ |
5345 | slot = htab_find_slot_with_hash (decl_die_table, decl, decl_id, INSERT); |
5346 | *slot = decl_die; | |
5347 | decl_die->decl_id = decl_id; | |
a3f97cbb | 5348 | } |
0a2d3d69 DB |
5349 | |
5350 | /* Add a variable location node to the linked list for DECL. */ | |
5351 | ||
5352 | static void | |
5353 | add_var_loc_to_decl (tree decl, struct var_loc_node *loc) | |
5354 | { | |
5355 | unsigned int decl_id = DECL_UID (decl); | |
5356 | var_loc_list *temp; | |
5357 | void **slot; | |
5358 | ||
5359 | slot = htab_find_slot_with_hash (decl_loc_table, decl, decl_id, INSERT); | |
5360 | if (*slot == NULL) | |
5361 | { | |
5362 | temp = ggc_alloc_cleared (sizeof (var_loc_list)); | |
5363 | temp->decl_id = decl_id; | |
5364 | *slot = temp; | |
5365 | } | |
5366 | else | |
5367 | temp = *slot; | |
5368 | ||
5369 | if (temp->last) | |
5370 | { | |
5371 | /* If the current location is the same as the end of the list, | |
5372 | we have nothing to do. */ | |
5373 | if (!rtx_equal_p (NOTE_VAR_LOCATION_LOC (temp->last->var_loc_note), | |
5374 | NOTE_VAR_LOCATION_LOC (loc->var_loc_note))) | |
5375 | { | |
5376 | /* Add LOC to the end of list and update LAST. */ | |
5377 | temp->last->next = loc; | |
5378 | temp->last = loc; | |
5379 | } | |
5380 | } | |
5381 | /* Do not add empty location to the beginning of the list. */ | |
5382 | else if (NOTE_VAR_LOCATION_LOC (loc->var_loc_note) != NULL_RTX) | |
5383 | { | |
5384 | temp->first = loc; | |
5385 | temp->last = loc; | |
5386 | } | |
5387 | } | |
3f76745e JM |
5388 | \f |
5389 | /* Keep track of the number of spaces used to indent the | |
5390 | output of the debugging routines that print the structure of | |
5391 | the DIE internal representation. */ | |
5392 | static int print_indent; | |
71dfc51f | 5393 | |
3f76745e JM |
5394 | /* Indent the line the number of spaces given by print_indent. */ |
5395 | ||
5396 | static inline void | |
7080f735 | 5397 | print_spaces (FILE *outfile) |
3f76745e JM |
5398 | { |
5399 | fprintf (outfile, "%*s", print_indent, ""); | |
a3f97cbb JW |
5400 | } |
5401 | ||
956d6950 | 5402 | /* Print the information associated with a given DIE, and its children. |
3f76745e | 5403 | This routine is a debugging aid only. */ |
71dfc51f | 5404 | |
a3f97cbb | 5405 | static void |
7080f735 | 5406 | print_die (dw_die_ref die, FILE *outfile) |
a3f97cbb | 5407 | { |
b3694847 SS |
5408 | dw_attr_ref a; |
5409 | dw_die_ref c; | |
71dfc51f | 5410 | |
3f76745e | 5411 | print_spaces (outfile); |
2d8b0f3a | 5412 | fprintf (outfile, "DIE %4lu: %s\n", |
3f76745e JM |
5413 | die->die_offset, dwarf_tag_name (die->die_tag)); |
5414 | print_spaces (outfile); | |
2d8b0f3a JL |
5415 | fprintf (outfile, " abbrev id: %lu", die->die_abbrev); |
5416 | fprintf (outfile, " offset: %lu\n", die->die_offset); | |
3f76745e JM |
5417 | |
5418 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) | |
a3f97cbb | 5419 | { |
3f76745e JM |
5420 | print_spaces (outfile); |
5421 | fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr)); | |
5422 | ||
a96c67ec | 5423 | switch (AT_class (a)) |
3f76745e JM |
5424 | { |
5425 | case dw_val_class_addr: | |
5426 | fprintf (outfile, "address"); | |
5427 | break; | |
a20612aa RH |
5428 | case dw_val_class_offset: |
5429 | fprintf (outfile, "offset"); | |
5430 | break; | |
3f76745e JM |
5431 | case dw_val_class_loc: |
5432 | fprintf (outfile, "location descriptor"); | |
5433 | break; | |
63e46568 | 5434 | case dw_val_class_loc_list: |
a20612aa RH |
5435 | fprintf (outfile, "location list -> label:%s", |
5436 | AT_loc_list (a)->ll_symbol); | |
63e46568 | 5437 | break; |
2bee6045 JJ |
5438 | case dw_val_class_range_list: |
5439 | fprintf (outfile, "range list"); | |
5440 | break; | |
3f76745e | 5441 | case dw_val_class_const: |
38f9cd4c | 5442 | fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, AT_int (a)); |
3f76745e JM |
5443 | break; |
5444 | case dw_val_class_unsigned_const: | |
38f9cd4c | 5445 | fprintf (outfile, HOST_WIDE_INT_PRINT_UNSIGNED, AT_unsigned (a)); |
3f76745e JM |
5446 | break; |
5447 | case dw_val_class_long_long: | |
2d8b0f3a | 5448 | fprintf (outfile, "constant (%lu,%lu)", |
556273e0 KH |
5449 | a->dw_attr_val.v.val_long_long.hi, |
5450 | a->dw_attr_val.v.val_long_long.low); | |
3f76745e | 5451 | break; |
e7ee3914 AM |
5452 | case dw_val_class_vec: |
5453 | fprintf (outfile, "floating-point or vector constant"); | |
3f76745e JM |
5454 | break; |
5455 | case dw_val_class_flag: | |
a96c67ec | 5456 | fprintf (outfile, "%u", AT_flag (a)); |
3f76745e JM |
5457 | break; |
5458 | case dw_val_class_die_ref: | |
a96c67ec | 5459 | if (AT_ref (a) != NULL) |
881c6935 | 5460 | { |
1bfb5f8f | 5461 | if (AT_ref (a)->die_symbol) |
881c6935 JM |
5462 | fprintf (outfile, "die -> label: %s", AT_ref (a)->die_symbol); |
5463 | else | |
5464 | fprintf (outfile, "die -> %lu", AT_ref (a)->die_offset); | |
5465 | } | |
3f76745e JM |
5466 | else |
5467 | fprintf (outfile, "die -> <null>"); | |
5468 | break; | |
5469 | case dw_val_class_lbl_id: | |
8b790721 | 5470 | case dw_val_class_lbl_offset: |
a96c67ec | 5471 | fprintf (outfile, "label: %s", AT_lbl (a)); |
3f76745e | 5472 | break; |
3f76745e | 5473 | case dw_val_class_str: |
a96c67ec JM |
5474 | if (AT_string (a) != NULL) |
5475 | fprintf (outfile, "\"%s\"", AT_string (a)); | |
3f76745e JM |
5476 | else |
5477 | fprintf (outfile, "<null>"); | |
5478 | break; | |
e9a25f70 JL |
5479 | default: |
5480 | break; | |
3f76745e JM |
5481 | } |
5482 | ||
5483 | fprintf (outfile, "\n"); | |
5484 | } | |
5485 | ||
5486 | if (die->die_child != NULL) | |
5487 | { | |
5488 | print_indent += 4; | |
5489 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
5490 | print_die (c, outfile); | |
71dfc51f | 5491 | |
3f76745e | 5492 | print_indent -= 4; |
a3f97cbb | 5493 | } |
881c6935 JM |
5494 | if (print_indent == 0) |
5495 | fprintf (outfile, "\n"); | |
a3f97cbb JW |
5496 | } |
5497 | ||
3f76745e JM |
5498 | /* Print the contents of the source code line number correspondence table. |
5499 | This routine is a debugging aid only. */ | |
71dfc51f | 5500 | |
3f76745e | 5501 | static void |
7080f735 | 5502 | print_dwarf_line_table (FILE *outfile) |
a3f97cbb | 5503 | { |
b3694847 SS |
5504 | unsigned i; |
5505 | dw_line_info_ref line_info; | |
3f76745e JM |
5506 | |
5507 | fprintf (outfile, "\n\nDWARF source line information\n"); | |
2ad9852d | 5508 | for (i = 1; i < line_info_table_in_use; i++) |
a3f97cbb | 5509 | { |
3f76745e JM |
5510 | line_info = &line_info_table[i]; |
5511 | fprintf (outfile, "%5d: ", i); | |
c4274b22 RH |
5512 | fprintf (outfile, "%-20s", |
5513 | VARRAY_CHAR_PTR (file_table, line_info->dw_file_num)); | |
2d8b0f3a | 5514 | fprintf (outfile, "%6ld", line_info->dw_line_num); |
3f76745e | 5515 | fprintf (outfile, "\n"); |
a3f97cbb | 5516 | } |
3f76745e JM |
5517 | |
5518 | fprintf (outfile, "\n\n"); | |
f37230f0 JM |
5519 | } |
5520 | ||
3f76745e JM |
5521 | /* Print the information collected for a given DIE. */ |
5522 | ||
5523 | void | |
7080f735 | 5524 | debug_dwarf_die (dw_die_ref die) |
3f76745e JM |
5525 | { |
5526 | print_die (die, stderr); | |
5527 | } | |
5528 | ||
5529 | /* Print all DWARF information collected for the compilation unit. | |
5530 | This routine is a debugging aid only. */ | |
5531 | ||
5532 | void | |
7080f735 | 5533 | debug_dwarf (void) |
3f76745e JM |
5534 | { |
5535 | print_indent = 0; | |
5536 | print_die (comp_unit_die, stderr); | |
b2244e22 JW |
5537 | if (! DWARF2_ASM_LINE_DEBUG_INFO) |
5538 | print_dwarf_line_table (stderr); | |
3f76745e JM |
5539 | } |
5540 | \f | |
a96c67ec JM |
5541 | /* We build up the lists of children and attributes by pushing new ones |
5542 | onto the beginning of the list. Reverse the lists for DIE so that | |
5543 | they are in order of addition. */ | |
71dfc51f | 5544 | |
f37230f0 | 5545 | static void |
7080f735 | 5546 | reverse_die_lists (dw_die_ref die) |
f37230f0 | 5547 | { |
b3694847 SS |
5548 | dw_die_ref c, cp, cn; |
5549 | dw_attr_ref a, ap, an; | |
71dfc51f | 5550 | |
a96c67ec | 5551 | for (a = die->die_attr, ap = 0; a; a = an) |
7d9d8943 AM |
5552 | { |
5553 | an = a->dw_attr_next; | |
5554 | a->dw_attr_next = ap; | |
5555 | ap = a; | |
a3f97cbb | 5556 | } |
2ad9852d | 5557 | |
7d9d8943 | 5558 | die->die_attr = ap; |
3f76745e | 5559 | |
7d9d8943 AM |
5560 | for (c = die->die_child, cp = 0; c; c = cn) |
5561 | { | |
5562 | cn = c->die_sib; | |
5563 | c->die_sib = cp; | |
5564 | cp = c; | |
5565 | } | |
2ad9852d | 5566 | |
7d9d8943 | 5567 | die->die_child = cp; |
a3f97cbb JW |
5568 | } |
5569 | ||
2ad9852d RK |
5570 | /* reverse_die_lists only reverses the single die you pass it. Since we used to |
5571 | reverse all dies in add_sibling_attributes, which runs through all the dies, | |
5572 | it would reverse all the dies. Now, however, since we don't call | |
5573 | reverse_die_lists in add_sibling_attributes, we need a routine to | |
5574 | recursively reverse all the dies. This is that routine. */ | |
71dfc51f | 5575 | |
7d9d8943 | 5576 | static void |
7080f735 | 5577 | reverse_all_dies (dw_die_ref die) |
a3f97cbb | 5578 | { |
b3694847 | 5579 | dw_die_ref c; |
71dfc51f | 5580 | |
7d9d8943 | 5581 | reverse_die_lists (die); |
3f76745e | 5582 | |
881c6935 JM |
5583 | for (c = die->die_child; c; c = c->die_sib) |
5584 | reverse_all_dies (c); | |
5585 | } | |
5586 | ||
2ad9852d RK |
5587 | /* Start a new compilation unit DIE for an include file. OLD_UNIT is the CU |
5588 | for the enclosing include file, if any. BINCL_DIE is the DW_TAG_GNU_BINCL | |
5589 | DIE that marks the start of the DIEs for this include file. */ | |
881c6935 JM |
5590 | |
5591 | static dw_die_ref | |
7080f735 | 5592 | push_new_compile_unit (dw_die_ref old_unit, dw_die_ref bincl_die) |
881c6935 JM |
5593 | { |
5594 | const char *filename = get_AT_string (bincl_die, DW_AT_name); | |
5595 | dw_die_ref new_unit = gen_compile_unit_die (filename); | |
2ad9852d | 5596 | |
881c6935 JM |
5597 | new_unit->die_sib = old_unit; |
5598 | return new_unit; | |
5599 | } | |
5600 | ||
5601 | /* Close an include-file CU and reopen the enclosing one. */ | |
5602 | ||
5603 | static dw_die_ref | |
7080f735 | 5604 | pop_compile_unit (dw_die_ref old_unit) |
881c6935 JM |
5605 | { |
5606 | dw_die_ref new_unit = old_unit->die_sib; | |
2ad9852d | 5607 | |
881c6935 JM |
5608 | old_unit->die_sib = NULL; |
5609 | return new_unit; | |
5610 | } | |
5611 | ||
2ad9852d RK |
5612 | #define CHECKSUM(FOO) md5_process_bytes (&(FOO), sizeof (FOO), ctx) |
5613 | #define CHECKSUM_STRING(FOO) md5_process_bytes ((FOO), strlen (FOO), ctx) | |
881c6935 JM |
5614 | |
5615 | /* Calculate the checksum of a location expression. */ | |
5616 | ||
5617 | static inline void | |
7080f735 | 5618 | loc_checksum (dw_loc_descr_ref loc, struct md5_ctx *ctx) |
881c6935 | 5619 | { |
2ad9852d RK |
5620 | CHECKSUM (loc->dw_loc_opc); |
5621 | CHECKSUM (loc->dw_loc_oprnd1); | |
5622 | CHECKSUM (loc->dw_loc_oprnd2); | |
881c6935 JM |
5623 | } |
5624 | ||
5625 | /* Calculate the checksum of an attribute. */ | |
5626 | ||
5627 | static void | |
7080f735 | 5628 | attr_checksum (dw_attr_ref at, struct md5_ctx *ctx, int *mark) |
881c6935 JM |
5629 | { |
5630 | dw_loc_descr_ref loc; | |
5631 | rtx r; | |
5632 | ||
2ad9852d | 5633 | CHECKSUM (at->dw_attr); |
881c6935 JM |
5634 | |
5635 | /* We don't care about differences in file numbering. */ | |
5f632b5e JM |
5636 | if (at->dw_attr == DW_AT_decl_file |
5637 | /* Or that this was compiled with a different compiler snapshot; if | |
5638 | the output is the same, that's what matters. */ | |
5639 | || at->dw_attr == DW_AT_producer) | |
881c6935 JM |
5640 | return; |
5641 | ||
5642 | switch (AT_class (at)) | |
5643 | { | |
5644 | case dw_val_class_const: | |
2ad9852d | 5645 | CHECKSUM (at->dw_attr_val.v.val_int); |
881c6935 JM |
5646 | break; |
5647 | case dw_val_class_unsigned_const: | |
2ad9852d | 5648 | CHECKSUM (at->dw_attr_val.v.val_unsigned); |
881c6935 JM |
5649 | break; |
5650 | case dw_val_class_long_long: | |
2ad9852d | 5651 | CHECKSUM (at->dw_attr_val.v.val_long_long); |
881c6935 | 5652 | break; |
e7ee3914 AM |
5653 | case dw_val_class_vec: |
5654 | CHECKSUM (at->dw_attr_val.v.val_vec); | |
881c6935 JM |
5655 | break; |
5656 | case dw_val_class_flag: | |
2ad9852d | 5657 | CHECKSUM (at->dw_attr_val.v.val_flag); |
881c6935 | 5658 | break; |
881c6935 | 5659 | case dw_val_class_str: |
2ad9852d | 5660 | CHECKSUM_STRING (AT_string (at)); |
881c6935 | 5661 | break; |
a20612aa | 5662 | |
881c6935 JM |
5663 | case dw_val_class_addr: |
5664 | r = AT_addr (at); | |
5665 | switch (GET_CODE (r)) | |
5666 | { | |
5667 | case SYMBOL_REF: | |
2ad9852d | 5668 | CHECKSUM_STRING (XSTR (r, 0)); |
881c6935 JM |
5669 | break; |
5670 | ||
5671 | default: | |
5672 | abort (); | |
5673 | } | |
5674 | break; | |
5675 | ||
a20612aa | 5676 | case dw_val_class_offset: |
2ad9852d | 5677 | CHECKSUM (at->dw_attr_val.v.val_offset); |
a20612aa RH |
5678 | break; |
5679 | ||
881c6935 JM |
5680 | case dw_val_class_loc: |
5681 | for (loc = AT_loc (at); loc; loc = loc->dw_loc_next) | |
5682 | loc_checksum (loc, ctx); | |
5683 | break; | |
5684 | ||
5685 | case dw_val_class_die_ref: | |
cc0017a9 ZD |
5686 | die_checksum (AT_ref (at), ctx, mark); |
5687 | break; | |
881c6935 JM |
5688 | |
5689 | case dw_val_class_fde_ref: | |
5690 | case dw_val_class_lbl_id: | |
5691 | case dw_val_class_lbl_offset: | |
a20612aa | 5692 | break; |
881c6935 JM |
5693 | |
5694 | default: | |
5695 | break; | |
5696 | } | |
5697 | } | |
5698 | ||
5699 | /* Calculate the checksum of a DIE. */ | |
5700 | ||
5701 | static void | |
7080f735 | 5702 | die_checksum (dw_die_ref die, struct md5_ctx *ctx, int *mark) |
881c6935 JM |
5703 | { |
5704 | dw_die_ref c; | |
5705 | dw_attr_ref a; | |
5706 | ||
cc0017a9 ZD |
5707 | /* To avoid infinite recursion. */ |
5708 | if (die->die_mark) | |
5709 | { | |
5710 | CHECKSUM (die->die_mark); | |
5711 | return; | |
5712 | } | |
5713 | die->die_mark = ++(*mark); | |
5714 | ||
2ad9852d | 5715 | CHECKSUM (die->die_tag); |
881c6935 JM |
5716 | |
5717 | for (a = die->die_attr; a; a = a->dw_attr_next) | |
cc0017a9 | 5718 | attr_checksum (a, ctx, mark); |
881c6935 JM |
5719 | |
5720 | for (c = die->die_child; c; c = c->die_sib) | |
cc0017a9 | 5721 | die_checksum (c, ctx, mark); |
881c6935 JM |
5722 | } |
5723 | ||
2ad9852d RK |
5724 | #undef CHECKSUM |
5725 | #undef CHECKSUM_STRING | |
881c6935 | 5726 | |
cc0017a9 ZD |
5727 | /* Do the location expressions look same? */ |
5728 | static inline int | |
7080f735 | 5729 | same_loc_p (dw_loc_descr_ref loc1, dw_loc_descr_ref loc2, int *mark) |
cc0017a9 ZD |
5730 | { |
5731 | return loc1->dw_loc_opc == loc2->dw_loc_opc | |
5732 | && same_dw_val_p (&loc1->dw_loc_oprnd1, &loc2->dw_loc_oprnd1, mark) | |
5733 | && same_dw_val_p (&loc1->dw_loc_oprnd2, &loc2->dw_loc_oprnd2, mark); | |
5734 | } | |
5735 | ||
5736 | /* Do the values look the same? */ | |
5737 | static int | |
7080f735 | 5738 | same_dw_val_p (dw_val_node *v1, dw_val_node *v2, int *mark) |
cc0017a9 ZD |
5739 | { |
5740 | dw_loc_descr_ref loc1, loc2; | |
5741 | rtx r1, r2; | |
cc0017a9 ZD |
5742 | |
5743 | if (v1->val_class != v2->val_class) | |
5744 | return 0; | |
5745 | ||
5746 | switch (v1->val_class) | |
5747 | { | |
5748 | case dw_val_class_const: | |
5749 | return v1->v.val_int == v2->v.val_int; | |
5750 | case dw_val_class_unsigned_const: | |
5751 | return v1->v.val_unsigned == v2->v.val_unsigned; | |
5752 | case dw_val_class_long_long: | |
5753 | return v1->v.val_long_long.hi == v2->v.val_long_long.hi | |
73c68f61 | 5754 | && v1->v.val_long_long.low == v2->v.val_long_long.low; |
e7ee3914 AM |
5755 | case dw_val_class_vec: |
5756 | if (v1->v.val_vec.length != v2->v.val_vec.length | |
5757 | || v1->v.val_vec.elt_size != v2->v.val_vec.elt_size) | |
5758 | return 0; | |
5759 | if (memcmp (v1->v.val_vec.array, v2->v.val_vec.array, | |
5760 | v1->v.val_vec.length * v1->v.val_vec.elt_size)) | |
cc0017a9 | 5761 | return 0; |
cc0017a9 ZD |
5762 | return 1; |
5763 | case dw_val_class_flag: | |
5764 | return v1->v.val_flag == v2->v.val_flag; | |
5765 | case dw_val_class_str: | |
17211ab5 | 5766 | return !strcmp(v1->v.val_str->str, v2->v.val_str->str); |
cc0017a9 ZD |
5767 | |
5768 | case dw_val_class_addr: | |
5769 | r1 = v1->v.val_addr; | |
5770 | r2 = v2->v.val_addr; | |
5771 | if (GET_CODE (r1) != GET_CODE (r2)) | |
5772 | return 0; | |
5773 | switch (GET_CODE (r1)) | |
5774 | { | |
5775 | case SYMBOL_REF: | |
5776 | return !strcmp (XSTR (r1, 0), XSTR (r2, 0)); | |
5777 | ||
5778 | default: | |
5779 | abort (); | |
5780 | } | |
5781 | ||
5782 | case dw_val_class_offset: | |
5783 | return v1->v.val_offset == v2->v.val_offset; | |
5784 | ||
5785 | case dw_val_class_loc: | |
5786 | for (loc1 = v1->v.val_loc, loc2 = v2->v.val_loc; | |
5787 | loc1 && loc2; | |
5788 | loc1 = loc1->dw_loc_next, loc2 = loc2->dw_loc_next) | |
5789 | if (!same_loc_p (loc1, loc2, mark)) | |
5790 | return 0; | |
5791 | return !loc1 && !loc2; | |
5792 | ||
5793 | case dw_val_class_die_ref: | |
5794 | return same_die_p (v1->v.val_die_ref.die, v2->v.val_die_ref.die, mark); | |
5795 | ||
5796 | case dw_val_class_fde_ref: | |
5797 | case dw_val_class_lbl_id: | |
5798 | case dw_val_class_lbl_offset: | |
5799 | return 1; | |
5800 | ||
5801 | default: | |
5802 | return 1; | |
5803 | } | |
5804 | } | |
5805 | ||
5806 | /* Do the attributes look the same? */ | |
5807 | ||
5808 | static int | |
7080f735 | 5809 | same_attr_p (dw_attr_ref at1, dw_attr_ref at2, int *mark) |
cc0017a9 ZD |
5810 | { |
5811 | if (at1->dw_attr != at2->dw_attr) | |
5812 | return 0; | |
5813 | ||
5814 | /* We don't care about differences in file numbering. */ | |
5815 | if (at1->dw_attr == DW_AT_decl_file | |
5816 | /* Or that this was compiled with a different compiler snapshot; if | |
5817 | the output is the same, that's what matters. */ | |
5818 | || at1->dw_attr == DW_AT_producer) | |
5819 | return 1; | |
5820 | ||
5821 | return same_dw_val_p (&at1->dw_attr_val, &at2->dw_attr_val, mark); | |
5822 | } | |
5823 | ||
5824 | /* Do the dies look the same? */ | |
5825 | ||
5826 | static int | |
7080f735 | 5827 | same_die_p (dw_die_ref die1, dw_die_ref die2, int *mark) |
cc0017a9 ZD |
5828 | { |
5829 | dw_die_ref c1, c2; | |
5830 | dw_attr_ref a1, a2; | |
5831 | ||
5832 | /* To avoid infinite recursion. */ | |
5833 | if (die1->die_mark) | |
5834 | return die1->die_mark == die2->die_mark; | |
5835 | die1->die_mark = die2->die_mark = ++(*mark); | |
5836 | ||
5837 | if (die1->die_tag != die2->die_tag) | |
5838 | return 0; | |
5839 | ||
5840 | for (a1 = die1->die_attr, a2 = die2->die_attr; | |
5841 | a1 && a2; | |
5842 | a1 = a1->dw_attr_next, a2 = a2->dw_attr_next) | |
5843 | if (!same_attr_p (a1, a2, mark)) | |
5844 | return 0; | |
5845 | if (a1 || a2) | |
5846 | return 0; | |
5847 | ||
5848 | for (c1 = die1->die_child, c2 = die2->die_child; | |
5849 | c1 && c2; | |
5850 | c1 = c1->die_sib, c2 = c2->die_sib) | |
5851 | if (!same_die_p (c1, c2, mark)) | |
5852 | return 0; | |
5853 | if (c1 || c2) | |
5854 | return 0; | |
5855 | ||
5856 | return 1; | |
5857 | } | |
5858 | ||
5859 | /* Do the dies look the same? Wrapper around same_die_p. */ | |
5860 | ||
5861 | static int | |
7080f735 | 5862 | same_die_p_wrap (dw_die_ref die1, dw_die_ref die2) |
cc0017a9 ZD |
5863 | { |
5864 | int mark = 0; | |
5865 | int ret = same_die_p (die1, die2, &mark); | |
5866 | ||
5867 | unmark_all_dies (die1); | |
5868 | unmark_all_dies (die2); | |
5869 | ||
5870 | return ret; | |
5871 | } | |
5872 | ||
881c6935 JM |
5873 | /* The prefix to attach to symbols on DIEs in the current comdat debug |
5874 | info section. */ | |
5875 | static char *comdat_symbol_id; | |
5876 | ||
5877 | /* The index of the current symbol within the current comdat CU. */ | |
5878 | static unsigned int comdat_symbol_number; | |
5879 | ||
5880 | /* Calculate the MD5 checksum of the compilation unit DIE UNIT_DIE and its | |
5881 | children, and set comdat_symbol_id accordingly. */ | |
5882 | ||
5883 | static void | |
7080f735 | 5884 | compute_section_prefix (dw_die_ref unit_die) |
881c6935 | 5885 | { |
cc0017a9 ZD |
5886 | const char *die_name = get_AT_string (unit_die, DW_AT_name); |
5887 | const char *base = die_name ? lbasename (die_name) : "anonymous"; | |
703ad42b | 5888 | char *name = alloca (strlen (base) + 64); |
f11c3043 | 5889 | char *p; |
cc0017a9 | 5890 | int i, mark; |
881c6935 JM |
5891 | unsigned char checksum[16]; |
5892 | struct md5_ctx ctx; | |
5893 | ||
f11c3043 RK |
5894 | /* Compute the checksum of the DIE, then append part of it as hex digits to |
5895 | the name filename of the unit. */ | |
5896 | ||
881c6935 | 5897 | md5_init_ctx (&ctx); |
cc0017a9 ZD |
5898 | mark = 0; |
5899 | die_checksum (unit_die, &ctx, &mark); | |
5900 | unmark_all_dies (unit_die); | |
881c6935 JM |
5901 | md5_finish_ctx (&ctx, checksum); |
5902 | ||
0023400b | 5903 | sprintf (name, "%s.", base); |
881c6935 JM |
5904 | clean_symbol_name (name); |
5905 | ||
2ad9852d RK |
5906 | p = name + strlen (name); |
5907 | for (i = 0; i < 4; i++) | |
5908 | { | |
5909 | sprintf (p, "%.2x", checksum[i]); | |
5910 | p += 2; | |
5911 | } | |
881c6935 JM |
5912 | |
5913 | comdat_symbol_id = unit_die->die_symbol = xstrdup (name); | |
5914 | comdat_symbol_number = 0; | |
5915 | } | |
5916 | ||
f11c3043 | 5917 | /* Returns nonzero if DIE represents a type, in the sense of TYPE_P. */ |
881c6935 JM |
5918 | |
5919 | static int | |
7080f735 | 5920 | is_type_die (dw_die_ref die) |
881c6935 JM |
5921 | { |
5922 | switch (die->die_tag) | |
5923 | { | |
5924 | case DW_TAG_array_type: | |
5925 | case DW_TAG_class_type: | |
5926 | case DW_TAG_enumeration_type: | |
5927 | case DW_TAG_pointer_type: | |
5928 | case DW_TAG_reference_type: | |
5929 | case DW_TAG_string_type: | |
5930 | case DW_TAG_structure_type: | |
5931 | case DW_TAG_subroutine_type: | |
5932 | case DW_TAG_union_type: | |
5933 | case DW_TAG_ptr_to_member_type: | |
5934 | case DW_TAG_set_type: | |
5935 | case DW_TAG_subrange_type: | |
5936 | case DW_TAG_base_type: | |
5937 | case DW_TAG_const_type: | |
5938 | case DW_TAG_file_type: | |
5939 | case DW_TAG_packed_type: | |
5940 | case DW_TAG_volatile_type: | |
cc0017a9 | 5941 | case DW_TAG_typedef: |
881c6935 JM |
5942 | return 1; |
5943 | default: | |
5944 | return 0; | |
5945 | } | |
5946 | } | |
5947 | ||
5948 | /* Returns 1 iff C is the sort of DIE that should go into a COMDAT CU. | |
5949 | Basically, we want to choose the bits that are likely to be shared between | |
5950 | compilations (types) and leave out the bits that are specific to individual | |
5951 | compilations (functions). */ | |
5952 | ||
5953 | static int | |
7080f735 | 5954 | is_comdat_die (dw_die_ref c) |
881c6935 | 5955 | { |
2ad9852d RK |
5956 | /* I think we want to leave base types and __vtbl_ptr_type in the main CU, as |
5957 | we do for stabs. The advantage is a greater likelihood of sharing between | |
5958 | objects that don't include headers in the same order (and therefore would | |
5959 | put the base types in a different comdat). jason 8/28/00 */ | |
5960 | ||
881c6935 JM |
5961 | if (c->die_tag == DW_TAG_base_type) |
5962 | return 0; | |
5963 | ||
5964 | if (c->die_tag == DW_TAG_pointer_type | |
5965 | || c->die_tag == DW_TAG_reference_type | |
5966 | || c->die_tag == DW_TAG_const_type | |
5967 | || c->die_tag == DW_TAG_volatile_type) | |
5968 | { | |
5969 | dw_die_ref t = get_AT_ref (c, DW_AT_type); | |
2ad9852d | 5970 | |
881c6935 JM |
5971 | return t ? is_comdat_die (t) : 0; |
5972 | } | |
881c6935 JM |
5973 | |
5974 | return is_type_die (c); | |
5975 | } | |
5976 | ||
5977 | /* Returns 1 iff C is the sort of DIE that might be referred to from another | |
5978 | compilation unit. */ | |
5979 | ||
5980 | static int | |
7080f735 | 5981 | is_symbol_die (dw_die_ref c) |
881c6935 | 5982 | { |
2ad9852d | 5983 | return (is_type_die (c) |
c26fbbca | 5984 | || (get_AT (c, DW_AT_declaration) |
2ad9852d | 5985 | && !get_AT (c, DW_AT_specification))); |
881c6935 JM |
5986 | } |
5987 | ||
5988 | static char * | |
7080f735 | 5989 | gen_internal_sym (const char *prefix) |
881c6935 JM |
5990 | { |
5991 | char buf[256]; | |
2ad9852d | 5992 | |
63e46568 | 5993 | ASM_GENERATE_INTERNAL_LABEL (buf, prefix, label_num++); |
881c6935 JM |
5994 | return xstrdup (buf); |
5995 | } | |
5996 | ||
5997 | /* Assign symbols to all worthy DIEs under DIE. */ | |
5998 | ||
5999 | static void | |
7080f735 | 6000 | assign_symbol_names (dw_die_ref die) |
881c6935 | 6001 | { |
b3694847 | 6002 | dw_die_ref c; |
881c6935 JM |
6003 | |
6004 | if (is_symbol_die (die)) | |
6005 | { | |
6006 | if (comdat_symbol_id) | |
6007 | { | |
6008 | char *p = alloca (strlen (comdat_symbol_id) + 64); | |
2ad9852d | 6009 | |
881c6935 JM |
6010 | sprintf (p, "%s.%s.%x", DIE_LABEL_PREFIX, |
6011 | comdat_symbol_id, comdat_symbol_number++); | |
6012 | die->die_symbol = xstrdup (p); | |
6013 | } | |
6014 | else | |
63e46568 | 6015 | die->die_symbol = gen_internal_sym ("LDIE"); |
881c6935 JM |
6016 | } |
6017 | ||
6018 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
6019 | assign_symbol_names (c); | |
6020 | } | |
6021 | ||
cc0017a9 ZD |
6022 | struct cu_hash_table_entry |
6023 | { | |
6024 | dw_die_ref cu; | |
6025 | unsigned min_comdat_num, max_comdat_num; | |
6026 | struct cu_hash_table_entry *next; | |
6027 | }; | |
6028 | ||
6029 | /* Routines to manipulate hash table of CUs. */ | |
6030 | static hashval_t | |
7080f735 | 6031 | htab_cu_hash (const void *of) |
cc0017a9 ZD |
6032 | { |
6033 | const struct cu_hash_table_entry *entry = of; | |
6034 | ||
6035 | return htab_hash_string (entry->cu->die_symbol); | |
6036 | } | |
6037 | ||
6038 | static int | |
7080f735 | 6039 | htab_cu_eq (const void *of1, const void *of2) |
cc0017a9 ZD |
6040 | { |
6041 | const struct cu_hash_table_entry *entry1 = of1; | |
6042 | const struct die_struct *entry2 = of2; | |
6043 | ||
6044 | return !strcmp (entry1->cu->die_symbol, entry2->die_symbol); | |
6045 | } | |
6046 | ||
6047 | static void | |
7080f735 | 6048 | htab_cu_del (void *what) |
cc0017a9 ZD |
6049 | { |
6050 | struct cu_hash_table_entry *next, *entry = what; | |
6051 | ||
6052 | while (entry) | |
6053 | { | |
6054 | next = entry->next; | |
6055 | free (entry); | |
6056 | entry = next; | |
6057 | } | |
6058 | } | |
6059 | ||
6060 | /* Check whether we have already seen this CU and set up SYM_NUM | |
6061 | accordingly. */ | |
6062 | static int | |
7080f735 | 6063 | check_duplicate_cu (dw_die_ref cu, htab_t htable, unsigned int *sym_num) |
cc0017a9 ZD |
6064 | { |
6065 | struct cu_hash_table_entry dummy; | |
6066 | struct cu_hash_table_entry **slot, *entry, *last = &dummy; | |
6067 | ||
6068 | dummy.max_comdat_num = 0; | |
6069 | ||
6070 | slot = (struct cu_hash_table_entry **) | |
6071 | htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_symbol), | |
6072 | INSERT); | |
6073 | entry = *slot; | |
6074 | ||
6075 | for (; entry; last = entry, entry = entry->next) | |
6076 | { | |
6077 | if (same_die_p_wrap (cu, entry->cu)) | |
6078 | break; | |
6079 | } | |
6080 | ||
6081 | if (entry) | |
6082 | { | |
6083 | *sym_num = entry->min_comdat_num; | |
6084 | return 1; | |
6085 | } | |
6086 | ||
6087 | entry = xcalloc (1, sizeof (struct cu_hash_table_entry)); | |
6088 | entry->cu = cu; | |
6089 | entry->min_comdat_num = *sym_num = last->max_comdat_num; | |
6090 | entry->next = *slot; | |
6091 | *slot = entry; | |
6092 | ||
6093 | return 0; | |
6094 | } | |
6095 | ||
6096 | /* Record SYM_NUM to record of CU in HTABLE. */ | |
6097 | static void | |
7080f735 | 6098 | record_comdat_symbol_number (dw_die_ref cu, htab_t htable, unsigned int sym_num) |
cc0017a9 ZD |
6099 | { |
6100 | struct cu_hash_table_entry **slot, *entry; | |
6101 | ||
6102 | slot = (struct cu_hash_table_entry **) | |
6103 | htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_symbol), | |
6104 | NO_INSERT); | |
6105 | entry = *slot; | |
6106 | ||
6107 | entry->max_comdat_num = sym_num; | |
6108 | } | |
6109 | ||
881c6935 JM |
6110 | /* Traverse the DIE (which is always comp_unit_die), and set up |
6111 | additional compilation units for each of the include files we see | |
6112 | bracketed by BINCL/EINCL. */ | |
6113 | ||
6114 | static void | |
7080f735 | 6115 | break_out_includes (dw_die_ref die) |
881c6935 JM |
6116 | { |
6117 | dw_die_ref *ptr; | |
b3694847 | 6118 | dw_die_ref unit = NULL; |
cc0017a9 ZD |
6119 | limbo_die_node *node, **pnode; |
6120 | htab_t cu_hash_table; | |
881c6935 | 6121 | |
c26fbbca | 6122 | for (ptr = &(die->die_child); *ptr;) |
881c6935 | 6123 | { |
b3694847 | 6124 | dw_die_ref c = *ptr; |
881c6935 | 6125 | |
2ad9852d | 6126 | if (c->die_tag == DW_TAG_GNU_BINCL || c->die_tag == DW_TAG_GNU_EINCL |
881c6935 JM |
6127 | || (unit && is_comdat_die (c))) |
6128 | { | |
6129 | /* This DIE is for a secondary CU; remove it from the main one. */ | |
6130 | *ptr = c->die_sib; | |
6131 | ||
6132 | if (c->die_tag == DW_TAG_GNU_BINCL) | |
6133 | { | |
6134 | unit = push_new_compile_unit (unit, c); | |
6135 | free_die (c); | |
6136 | } | |
6137 | else if (c->die_tag == DW_TAG_GNU_EINCL) | |
6138 | { | |
6139 | unit = pop_compile_unit (unit); | |
6140 | free_die (c); | |
6141 | } | |
6142 | else | |
6143 | add_child_die (unit, c); | |
6144 | } | |
6145 | else | |
6146 | { | |
6147 | /* Leave this DIE in the main CU. */ | |
6148 | ptr = &(c->die_sib); | |
6149 | continue; | |
6150 | } | |
6151 | } | |
6152 | ||
6153 | #if 0 | |
6154 | /* We can only use this in debugging, since the frontend doesn't check | |
0b34cf1e | 6155 | to make sure that we leave every include file we enter. */ |
881c6935 JM |
6156 | if (unit != NULL) |
6157 | abort (); | |
6158 | #endif | |
6159 | ||
6160 | assign_symbol_names (die); | |
cc0017a9 ZD |
6161 | cu_hash_table = htab_create (10, htab_cu_hash, htab_cu_eq, htab_cu_del); |
6162 | for (node = limbo_die_list, pnode = &limbo_die_list; | |
6163 | node; | |
6164 | node = node->next) | |
881c6935 | 6165 | { |
cc0017a9 ZD |
6166 | int is_dupl; |
6167 | ||
881c6935 | 6168 | compute_section_prefix (node->die); |
cc0017a9 ZD |
6169 | is_dupl = check_duplicate_cu (node->die, cu_hash_table, |
6170 | &comdat_symbol_number); | |
881c6935 | 6171 | assign_symbol_names (node->die); |
cc0017a9 ZD |
6172 | if (is_dupl) |
6173 | *pnode = node->next; | |
6174 | else | |
73c68f61 | 6175 | { |
cc0017a9 ZD |
6176 | pnode = &node->next; |
6177 | record_comdat_symbol_number (node->die, cu_hash_table, | |
6178 | comdat_symbol_number); | |
6179 | } | |
881c6935 | 6180 | } |
cc0017a9 | 6181 | htab_delete (cu_hash_table); |
881c6935 JM |
6182 | } |
6183 | ||
6184 | /* Traverse the DIE and add a sibling attribute if it may have the | |
6185 | effect of speeding up access to siblings. To save some space, | |
6186 | avoid generating sibling attributes for DIE's without children. */ | |
6187 | ||
6188 | static void | |
7080f735 | 6189 | add_sibling_attributes (dw_die_ref die) |
881c6935 | 6190 | { |
b3694847 | 6191 | dw_die_ref c; |
881c6935 JM |
6192 | |
6193 | if (die->die_tag != DW_TAG_compile_unit | |
6194 | && die->die_sib && die->die_child != NULL) | |
7d9d8943 AM |
6195 | /* Add the sibling link to the front of the attribute list. */ |
6196 | add_AT_die_ref (die, DW_AT_sibling, die->die_sib); | |
6197 | ||
6198 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
6199 | add_sibling_attributes (c); | |
6200 | } | |
6201 | ||
2ad9852d RK |
6202 | /* Output all location lists for the DIE and its children. */ |
6203 | ||
63e46568 | 6204 | static void |
7080f735 | 6205 | output_location_lists (dw_die_ref die) |
63e46568 DB |
6206 | { |
6207 | dw_die_ref c; | |
6208 | dw_attr_ref d_attr; | |
2ad9852d | 6209 | |
63e46568 | 6210 | for (d_attr = die->die_attr; d_attr; d_attr = d_attr->dw_attr_next) |
2ad9852d RK |
6211 | if (AT_class (d_attr) == dw_val_class_loc_list) |
6212 | output_loc_list (AT_loc_list (d_attr)); | |
6213 | ||
63e46568 DB |
6214 | for (c = die->die_child; c != NULL; c = c->die_sib) |
6215 | output_location_lists (c); | |
6216 | ||
6217 | } | |
c26fbbca | 6218 | |
2ad9852d RK |
6219 | /* The format of each DIE (and its attribute value pairs) is encoded in an |
6220 | abbreviation table. This routine builds the abbreviation table and assigns | |
6221 | a unique abbreviation id for each abbreviation entry. The children of each | |
6222 | die are visited recursively. */ | |
7d9d8943 AM |
6223 | |
6224 | static void | |
7080f735 | 6225 | build_abbrev_table (dw_die_ref die) |
7d9d8943 | 6226 | { |
b3694847 SS |
6227 | unsigned long abbrev_id; |
6228 | unsigned int n_alloc; | |
6229 | dw_die_ref c; | |
6230 | dw_attr_ref d_attr, a_attr; | |
881c6935 JM |
6231 | |
6232 | /* Scan the DIE references, and mark as external any that refer to | |
1bfb5f8f | 6233 | DIEs from other CUs (i.e. those which are not marked). */ |
881c6935 | 6234 | for (d_attr = die->die_attr; d_attr; d_attr = d_attr->dw_attr_next) |
2ad9852d RK |
6235 | if (AT_class (d_attr) == dw_val_class_die_ref |
6236 | && AT_ref (d_attr)->die_mark == 0) | |
6237 | { | |
6238 | if (AT_ref (d_attr)->die_symbol == 0) | |
6239 | abort (); | |
6240 | ||
6241 | set_AT_ref_external (d_attr, 1); | |
6242 | } | |
881c6935 | 6243 | |
7d9d8943 AM |
6244 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
6245 | { | |
b3694847 | 6246 | dw_die_ref abbrev = abbrev_die_table[abbrev_id]; |
7d9d8943 AM |
6247 | |
6248 | if (abbrev->die_tag == die->die_tag) | |
6249 | { | |
6250 | if ((abbrev->die_child != NULL) == (die->die_child != NULL)) | |
6251 | { | |
6252 | a_attr = abbrev->die_attr; | |
6253 | d_attr = die->die_attr; | |
6254 | ||
6255 | while (a_attr != NULL && d_attr != NULL) | |
6256 | { | |
6257 | if ((a_attr->dw_attr != d_attr->dw_attr) | |
6258 | || (value_format (a_attr) != value_format (d_attr))) | |
6259 | break; | |
6260 | ||
6261 | a_attr = a_attr->dw_attr_next; | |
6262 | d_attr = d_attr->dw_attr_next; | |
6263 | } | |
6264 | ||
6265 | if (a_attr == NULL && d_attr == NULL) | |
6266 | break; | |
6267 | } | |
6268 | } | |
6269 | } | |
6270 | ||
6271 | if (abbrev_id >= abbrev_die_table_in_use) | |
6272 | { | |
6273 | if (abbrev_die_table_in_use >= abbrev_die_table_allocated) | |
6274 | { | |
6275 | n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT; | |
17211ab5 GK |
6276 | abbrev_die_table = ggc_realloc (abbrev_die_table, |
6277 | sizeof (dw_die_ref) * n_alloc); | |
7d9d8943 | 6278 | |
703ad42b | 6279 | memset (&abbrev_die_table[abbrev_die_table_allocated], 0, |
7d9d8943 AM |
6280 | (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref)); |
6281 | abbrev_die_table_allocated = n_alloc; | |
6282 | } | |
6283 | ||
6284 | ++abbrev_die_table_in_use; | |
6285 | abbrev_die_table[abbrev_id] = die; | |
6286 | } | |
6287 | ||
6288 | die->die_abbrev = abbrev_id; | |
6289 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
6290 | build_abbrev_table (c); | |
6291 | } | |
6292 | \f | |
3f76745e JM |
6293 | /* Return the power-of-two number of bytes necessary to represent VALUE. */ |
6294 | ||
6295 | static int | |
7080f735 | 6296 | constant_size (long unsigned int value) |
3f76745e JM |
6297 | { |
6298 | int log; | |
6299 | ||
6300 | if (value == 0) | |
6301 | log = 0; | |
a3f97cbb | 6302 | else |
3f76745e | 6303 | log = floor_log2 (value); |
71dfc51f | 6304 | |
3f76745e JM |
6305 | log = log / 8; |
6306 | log = 1 << (floor_log2 (log) + 1); | |
6307 | ||
6308 | return log; | |
a3f97cbb JW |
6309 | } |
6310 | ||
2ad9852d | 6311 | /* Return the size of a DIE as it is represented in the |
3f76745e | 6312 | .debug_info section. */ |
71dfc51f | 6313 | |
3f76745e | 6314 | static unsigned long |
7080f735 | 6315 | size_of_die (dw_die_ref die) |
a3f97cbb | 6316 | { |
b3694847 SS |
6317 | unsigned long size = 0; |
6318 | dw_attr_ref a; | |
71dfc51f | 6319 | |
3f76745e | 6320 | size += size_of_uleb128 (die->die_abbrev); |
a3f97cbb JW |
6321 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) |
6322 | { | |
a96c67ec | 6323 | switch (AT_class (a)) |
a3f97cbb JW |
6324 | { |
6325 | case dw_val_class_addr: | |
a1a4189d | 6326 | size += DWARF2_ADDR_SIZE; |
a3f97cbb | 6327 | break; |
a20612aa RH |
6328 | case dw_val_class_offset: |
6329 | size += DWARF_OFFSET_SIZE; | |
6330 | break; | |
a3f97cbb | 6331 | case dw_val_class_loc: |
3f76745e | 6332 | { |
b3694847 | 6333 | unsigned long lsize = size_of_locs (AT_loc (a)); |
71dfc51f | 6334 | |
3f76745e JM |
6335 | /* Block length. */ |
6336 | size += constant_size (lsize); | |
6337 | size += lsize; | |
6338 | } | |
a3f97cbb | 6339 | break; |
63e46568 DB |
6340 | case dw_val_class_loc_list: |
6341 | size += DWARF_OFFSET_SIZE; | |
6342 | break; | |
2bee6045 JJ |
6343 | case dw_val_class_range_list: |
6344 | size += DWARF_OFFSET_SIZE; | |
6345 | break; | |
a3f97cbb | 6346 | case dw_val_class_const: |
25dd13ec | 6347 | size += size_of_sleb128 (AT_int (a)); |
a3f97cbb JW |
6348 | break; |
6349 | case dw_val_class_unsigned_const: | |
a96c67ec | 6350 | size += constant_size (AT_unsigned (a)); |
a3f97cbb | 6351 | break; |
469ac993 | 6352 | case dw_val_class_long_long: |
2e4b9b8c | 6353 | size += 1 + 2*HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR; /* block */ |
469ac993 | 6354 | break; |
e7ee3914 AM |
6355 | case dw_val_class_vec: |
6356 | size += 1 + (a->dw_attr_val.v.val_vec.length | |
6357 | * a->dw_attr_val.v.val_vec.elt_size); /* block */ | |
a3f97cbb JW |
6358 | break; |
6359 | case dw_val_class_flag: | |
3f76745e | 6360 | size += 1; |
a3f97cbb JW |
6361 | break; |
6362 | case dw_val_class_die_ref: | |
323658ea ZD |
6363 | if (AT_ref_external (a)) |
6364 | size += DWARF2_ADDR_SIZE; | |
6365 | else | |
6366 | size += DWARF_OFFSET_SIZE; | |
a3f97cbb JW |
6367 | break; |
6368 | case dw_val_class_fde_ref: | |
3f76745e | 6369 | size += DWARF_OFFSET_SIZE; |
a3f97cbb JW |
6370 | break; |
6371 | case dw_val_class_lbl_id: | |
a1a4189d | 6372 | size += DWARF2_ADDR_SIZE; |
3f76745e | 6373 | break; |
8b790721 | 6374 | case dw_val_class_lbl_offset: |
3f76745e JM |
6375 | size += DWARF_OFFSET_SIZE; |
6376 | break; | |
6377 | case dw_val_class_str: | |
9eb4015a JJ |
6378 | if (AT_string_form (a) == DW_FORM_strp) |
6379 | size += DWARF_OFFSET_SIZE; | |
6380 | else | |
17211ab5 | 6381 | size += strlen (a->dw_attr_val.v.val_str->str) + 1; |
3f76745e JM |
6382 | break; |
6383 | default: | |
6384 | abort (); | |
6385 | } | |
a3f97cbb | 6386 | } |
3f76745e JM |
6387 | |
6388 | return size; | |
a3f97cbb JW |
6389 | } |
6390 | ||
2ad9852d RK |
6391 | /* Size the debugging information associated with a given DIE. Visits the |
6392 | DIE's children recursively. Updates the global variable next_die_offset, on | |
6393 | each time through. Uses the current value of next_die_offset to update the | |
6394 | die_offset field in each DIE. */ | |
71dfc51f | 6395 | |
a3f97cbb | 6396 | static void |
7080f735 | 6397 | calc_die_sizes (dw_die_ref die) |
a3f97cbb | 6398 | { |
b3694847 | 6399 | dw_die_ref c; |
2ad9852d | 6400 | |
3f76745e JM |
6401 | die->die_offset = next_die_offset; |
6402 | next_die_offset += size_of_die (die); | |
71dfc51f | 6403 | |
3f76745e JM |
6404 | for (c = die->die_child; c != NULL; c = c->die_sib) |
6405 | calc_die_sizes (c); | |
71dfc51f | 6406 | |
3f76745e JM |
6407 | if (die->die_child != NULL) |
6408 | /* Count the null byte used to terminate sibling lists. */ | |
6409 | next_die_offset += 1; | |
a3f97cbb JW |
6410 | } |
6411 | ||
1bfb5f8f | 6412 | /* Set the marks for a die and its children. We do this so |
881c6935 | 6413 | that we know whether or not a reference needs to use FORM_ref_addr; only |
1bfb5f8f JM |
6414 | DIEs in the same CU will be marked. We used to clear out the offset |
6415 | and use that as the flag, but ran into ordering problems. */ | |
881c6935 JM |
6416 | |
6417 | static void | |
7080f735 | 6418 | mark_dies (dw_die_ref die) |
881c6935 | 6419 | { |
b3694847 | 6420 | dw_die_ref c; |
2ad9852d | 6421 | |
cc0017a9 ZD |
6422 | if (die->die_mark) |
6423 | abort (); | |
7080f735 | 6424 | |
1bfb5f8f JM |
6425 | die->die_mark = 1; |
6426 | for (c = die->die_child; c; c = c->die_sib) | |
6427 | mark_dies (c); | |
6428 | } | |
6429 | ||
6430 | /* Clear the marks for a die and its children. */ | |
6431 | ||
6432 | static void | |
7080f735 | 6433 | unmark_dies (dw_die_ref die) |
1bfb5f8f | 6434 | { |
b3694847 | 6435 | dw_die_ref c; |
2ad9852d | 6436 | |
cc0017a9 ZD |
6437 | if (!die->die_mark) |
6438 | abort (); | |
7080f735 | 6439 | |
1bfb5f8f | 6440 | die->die_mark = 0; |
881c6935 | 6441 | for (c = die->die_child; c; c = c->die_sib) |
1bfb5f8f | 6442 | unmark_dies (c); |
881c6935 JM |
6443 | } |
6444 | ||
cc0017a9 ZD |
6445 | /* Clear the marks for a die, its children and referred dies. */ |
6446 | ||
6447 | static void | |
7080f735 | 6448 | unmark_all_dies (dw_die_ref die) |
cc0017a9 ZD |
6449 | { |
6450 | dw_die_ref c; | |
6451 | dw_attr_ref a; | |
6452 | ||
6453 | if (!die->die_mark) | |
6454 | return; | |
6455 | die->die_mark = 0; | |
6456 | ||
6457 | for (c = die->die_child; c; c = c->die_sib) | |
6458 | unmark_all_dies (c); | |
6459 | ||
6460 | for (a = die->die_attr; a; a = a->dw_attr_next) | |
6461 | if (AT_class (a) == dw_val_class_die_ref) | |
6462 | unmark_all_dies (AT_ref (a)); | |
6463 | } | |
6464 | ||
3f76745e JM |
6465 | /* Return the size of the .debug_pubnames table generated for the |
6466 | compilation unit. */ | |
a94dbf2c | 6467 | |
3f76745e | 6468 | static unsigned long |
7080f735 | 6469 | size_of_pubnames (void) |
a94dbf2c | 6470 | { |
b3694847 SS |
6471 | unsigned long size; |
6472 | unsigned i; | |
469ac993 | 6473 | |
3f76745e | 6474 | size = DWARF_PUBNAMES_HEADER_SIZE; |
2ad9852d | 6475 | for (i = 0; i < pubname_table_in_use; i++) |
a94dbf2c | 6476 | { |
b3694847 | 6477 | pubname_ref p = &pubname_table[i]; |
9eb4015a | 6478 | size += DWARF_OFFSET_SIZE + strlen (p->name) + 1; |
a94dbf2c JM |
6479 | } |
6480 | ||
3f76745e JM |
6481 | size += DWARF_OFFSET_SIZE; |
6482 | return size; | |
a94dbf2c JM |
6483 | } |
6484 | ||
956d6950 | 6485 | /* Return the size of the information in the .debug_aranges section. */ |
469ac993 | 6486 | |
3f76745e | 6487 | static unsigned long |
7080f735 | 6488 | size_of_aranges (void) |
469ac993 | 6489 | { |
b3694847 | 6490 | unsigned long size; |
469ac993 | 6491 | |
3f76745e | 6492 | size = DWARF_ARANGES_HEADER_SIZE; |
469ac993 | 6493 | |
3f76745e | 6494 | /* Count the address/length pair for this compilation unit. */ |
a1a4189d JB |
6495 | size += 2 * DWARF2_ADDR_SIZE; |
6496 | size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use; | |
469ac993 | 6497 | |
3f76745e | 6498 | /* Count the two zero words used to terminated the address range table. */ |
a1a4189d | 6499 | size += 2 * DWARF2_ADDR_SIZE; |
3f76745e JM |
6500 | return size; |
6501 | } | |
6502 | \f | |
6503 | /* Select the encoding of an attribute value. */ | |
6504 | ||
6505 | static enum dwarf_form | |
7080f735 | 6506 | value_format (dw_attr_ref a) |
3f76745e | 6507 | { |
a96c67ec | 6508 | switch (a->dw_attr_val.val_class) |
469ac993 | 6509 | { |
3f76745e JM |
6510 | case dw_val_class_addr: |
6511 | return DW_FORM_addr; | |
2bee6045 | 6512 | case dw_val_class_range_list: |
a20612aa RH |
6513 | case dw_val_class_offset: |
6514 | if (DWARF_OFFSET_SIZE == 4) | |
6515 | return DW_FORM_data4; | |
6516 | if (DWARF_OFFSET_SIZE == 8) | |
6517 | return DW_FORM_data8; | |
6518 | abort (); | |
63e46568 | 6519 | case dw_val_class_loc_list: |
9d2f2c45 RH |
6520 | /* FIXME: Could be DW_FORM_data8, with a > 32 bit size |
6521 | .debug_loc section */ | |
6522 | return DW_FORM_data4; | |
3f76745e | 6523 | case dw_val_class_loc: |
a96c67ec | 6524 | switch (constant_size (size_of_locs (AT_loc (a)))) |
469ac993 | 6525 | { |
3f76745e JM |
6526 | case 1: |
6527 | return DW_FORM_block1; | |
6528 | case 2: | |
6529 | return DW_FORM_block2; | |
469ac993 JM |
6530 | default: |
6531 | abort (); | |
6532 | } | |
3f76745e | 6533 | case dw_val_class_const: |
25dd13ec | 6534 | return DW_FORM_sdata; |
3f76745e | 6535 | case dw_val_class_unsigned_const: |
a96c67ec | 6536 | switch (constant_size (AT_unsigned (a))) |
3f76745e JM |
6537 | { |
6538 | case 1: | |
6539 | return DW_FORM_data1; | |
6540 | case 2: | |
6541 | return DW_FORM_data2; | |
6542 | case 4: | |
6543 | return DW_FORM_data4; | |
6544 | case 8: | |
6545 | return DW_FORM_data8; | |
6546 | default: | |
6547 | abort (); | |
6548 | } | |
6549 | case dw_val_class_long_long: | |
6550 | return DW_FORM_block1; | |
e7ee3914 | 6551 | case dw_val_class_vec: |
3f76745e JM |
6552 | return DW_FORM_block1; |
6553 | case dw_val_class_flag: | |
6554 | return DW_FORM_flag; | |
6555 | case dw_val_class_die_ref: | |
881c6935 JM |
6556 | if (AT_ref_external (a)) |
6557 | return DW_FORM_ref_addr; | |
6558 | else | |
6559 | return DW_FORM_ref; | |
3f76745e JM |
6560 | case dw_val_class_fde_ref: |
6561 | return DW_FORM_data; | |
6562 | case dw_val_class_lbl_id: | |
6563 | return DW_FORM_addr; | |
8b790721 | 6564 | case dw_val_class_lbl_offset: |
3f76745e JM |
6565 | return DW_FORM_data; |
6566 | case dw_val_class_str: | |
9eb4015a | 6567 | return AT_string_form (a); |
a20612aa | 6568 | |
469ac993 JM |
6569 | default: |
6570 | abort (); | |
6571 | } | |
a94dbf2c JM |
6572 | } |
6573 | ||
3f76745e | 6574 | /* Output the encoding of an attribute value. */ |
469ac993 | 6575 | |
3f76745e | 6576 | static void |
7080f735 | 6577 | output_value_format (dw_attr_ref a) |
a94dbf2c | 6578 | { |
a96c67ec | 6579 | enum dwarf_form form = value_format (a); |
2ad9852d | 6580 | |
2e4b9b8c | 6581 | dw2_asm_output_data_uleb128 (form, "(%s)", dwarf_form_name (form)); |
3f76745e | 6582 | } |
469ac993 | 6583 | |
3f76745e JM |
6584 | /* Output the .debug_abbrev section which defines the DIE abbreviation |
6585 | table. */ | |
469ac993 | 6586 | |
3f76745e | 6587 | static void |
7080f735 | 6588 | output_abbrev_section (void) |
3f76745e JM |
6589 | { |
6590 | unsigned long abbrev_id; | |
71dfc51f | 6591 | |
3f76745e | 6592 | dw_attr_ref a_attr; |
2ad9852d | 6593 | |
3f76745e JM |
6594 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
6595 | { | |
b3694847 | 6596 | dw_die_ref abbrev = abbrev_die_table[abbrev_id]; |
71dfc51f | 6597 | |
2e4b9b8c | 6598 | dw2_asm_output_data_uleb128 (abbrev_id, "(abbrev code)"); |
2e4b9b8c RH |
6599 | dw2_asm_output_data_uleb128 (abbrev->die_tag, "(TAG: %s)", |
6600 | dwarf_tag_name (abbrev->die_tag)); | |
71dfc51f | 6601 | |
2e4b9b8c RH |
6602 | if (abbrev->die_child != NULL) |
6603 | dw2_asm_output_data (1, DW_children_yes, "DW_children_yes"); | |
6604 | else | |
6605 | dw2_asm_output_data (1, DW_children_no, "DW_children_no"); | |
3f76745e JM |
6606 | |
6607 | for (a_attr = abbrev->die_attr; a_attr != NULL; | |
6608 | a_attr = a_attr->dw_attr_next) | |
6609 | { | |
2e4b9b8c RH |
6610 | dw2_asm_output_data_uleb128 (a_attr->dw_attr, "(%s)", |
6611 | dwarf_attr_name (a_attr->dw_attr)); | |
a96c67ec | 6612 | output_value_format (a_attr); |
469ac993 | 6613 | } |
469ac993 | 6614 | |
2e4b9b8c RH |
6615 | dw2_asm_output_data (1, 0, NULL); |
6616 | dw2_asm_output_data (1, 0, NULL); | |
469ac993 | 6617 | } |
81f374eb HPN |
6618 | |
6619 | /* Terminate the table. */ | |
2e4b9b8c | 6620 | dw2_asm_output_data (1, 0, NULL); |
a94dbf2c JM |
6621 | } |
6622 | ||
881c6935 JM |
6623 | /* Output a symbol we can use to refer to this DIE from another CU. */ |
6624 | ||
6625 | static inline void | |
7080f735 | 6626 | output_die_symbol (dw_die_ref die) |
881c6935 JM |
6627 | { |
6628 | char *sym = die->die_symbol; | |
6629 | ||
6630 | if (sym == 0) | |
6631 | return; | |
6632 | ||
6633 | if (strncmp (sym, DIE_LABEL_PREFIX, sizeof (DIE_LABEL_PREFIX) - 1) == 0) | |
6634 | /* We make these global, not weak; if the target doesn't support | |
6635 | .linkonce, it doesn't support combining the sections, so debugging | |
6636 | will break. */ | |
5fd9b178 | 6637 | targetm.asm_out.globalize_label (asm_out_file, sym); |
2ad9852d | 6638 | |
881c6935 JM |
6639 | ASM_OUTPUT_LABEL (asm_out_file, sym); |
6640 | } | |
6641 | ||
84a5b4f8 | 6642 | /* Return a new location list, given the begin and end range, and the |
2ad9852d RK |
6643 | expression. gensym tells us whether to generate a new internal symbol for |
6644 | this location list node, which is done for the head of the list only. */ | |
6645 | ||
84a5b4f8 | 6646 | static inline dw_loc_list_ref |
7080f735 AJ |
6647 | new_loc_list (dw_loc_descr_ref expr, const char *begin, const char *end, |
6648 | const char *section, unsigned int gensym) | |
84a5b4f8 | 6649 | { |
17211ab5 | 6650 | dw_loc_list_ref retlist = ggc_alloc_cleared (sizeof (dw_loc_list_node)); |
2ad9852d | 6651 | |
84a5b4f8 DB |
6652 | retlist->begin = begin; |
6653 | retlist->end = end; | |
6654 | retlist->expr = expr; | |
6655 | retlist->section = section; | |
c26fbbca | 6656 | if (gensym) |
84a5b4f8 | 6657 | retlist->ll_symbol = gen_internal_sym ("LLST"); |
2ad9852d | 6658 | |
84a5b4f8 DB |
6659 | return retlist; |
6660 | } | |
6661 | ||
f9da5064 | 6662 | /* Add a location description expression to a location list. */ |
2ad9852d | 6663 | |
84a5b4f8 | 6664 | static inline void |
7080f735 AJ |
6665 | add_loc_descr_to_loc_list (dw_loc_list_ref *list_head, dw_loc_descr_ref descr, |
6666 | const char *begin, const char *end, | |
6667 | const char *section) | |
84a5b4f8 | 6668 | { |
b3694847 | 6669 | dw_loc_list_ref *d; |
c26fbbca | 6670 | |
30f7a378 | 6671 | /* Find the end of the chain. */ |
84a5b4f8 DB |
6672 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) |
6673 | ; | |
2ad9852d | 6674 | |
f9da5064 | 6675 | /* Add a new location list node to the list. */ |
84a5b4f8 DB |
6676 | *d = new_loc_list (descr, begin, end, section, 0); |
6677 | } | |
6678 | ||
f9da5064 | 6679 | /* Output the location list given to us. */ |
2ad9852d | 6680 | |
63e46568 | 6681 | static void |
7080f735 | 6682 | output_loc_list (dw_loc_list_ref list_head) |
63e46568 | 6683 | { |
2ad9852d RK |
6684 | dw_loc_list_ref curr = list_head; |
6685 | ||
63e46568 | 6686 | ASM_OUTPUT_LABEL (asm_out_file, list_head->ll_symbol); |
a20612aa | 6687 | |
1711adc2 | 6688 | /* Walk the location list, and output each range + expression. */ |
c26fbbca | 6689 | for (curr = list_head; curr != NULL; curr = curr->dw_loc_next) |
63e46568 | 6690 | { |
2bee6045 | 6691 | unsigned long size; |
1711adc2 DB |
6692 | if (separate_line_info_table_in_use == 0) |
6693 | { | |
6694 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->begin, curr->section, | |
6695 | "Location list begin address (%s)", | |
6696 | list_head->ll_symbol); | |
6697 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->end, curr->section, | |
6698 | "Location list end address (%s)", | |
6699 | list_head->ll_symbol); | |
6700 | } | |
6701 | else | |
6702 | { | |
6703 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->begin, | |
6704 | "Location list begin address (%s)", | |
6705 | list_head->ll_symbol); | |
6706 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->end, | |
6707 | "Location list end address (%s)", | |
6708 | list_head->ll_symbol); | |
6709 | } | |
63e46568 | 6710 | size = size_of_locs (curr->expr); |
c26fbbca | 6711 | |
63e46568 | 6712 | /* Output the block length for this list of location operations. */ |
2bee6045 JJ |
6713 | if (size > 0xffff) |
6714 | abort (); | |
6715 | dw2_asm_output_data (2, size, "%s", "Location expression size"); | |
6716 | ||
63e46568 DB |
6717 | output_loc_sequence (curr->expr); |
6718 | } | |
2ad9852d | 6719 | |
1711adc2 | 6720 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, |
aafdcfcd NS |
6721 | "Location list terminator begin (%s)", |
6722 | list_head->ll_symbol); | |
1711adc2 | 6723 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, |
aafdcfcd NS |
6724 | "Location list terminator end (%s)", |
6725 | list_head->ll_symbol); | |
63e46568 | 6726 | } |
9eb4015a | 6727 | |
3f76745e JM |
6728 | /* Output the DIE and its attributes. Called recursively to generate |
6729 | the definitions of each child DIE. */ | |
71dfc51f | 6730 | |
a3f97cbb | 6731 | static void |
7080f735 | 6732 | output_die (dw_die_ref die) |
a3f97cbb | 6733 | { |
b3694847 SS |
6734 | dw_attr_ref a; |
6735 | dw_die_ref c; | |
6736 | unsigned long size; | |
a94dbf2c | 6737 | |
881c6935 JM |
6738 | /* If someone in another CU might refer to us, set up a symbol for |
6739 | them to point to. */ | |
6740 | if (die->die_symbol) | |
6741 | output_die_symbol (die); | |
6742 | ||
2e4b9b8c RH |
6743 | dw2_asm_output_data_uleb128 (die->die_abbrev, "(DIE (0x%lx) %s)", |
6744 | die->die_offset, dwarf_tag_name (die->die_tag)); | |
a94dbf2c | 6745 | |
3f76745e | 6746 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) |
a3f97cbb | 6747 | { |
2e4b9b8c RH |
6748 | const char *name = dwarf_attr_name (a->dw_attr); |
6749 | ||
a96c67ec | 6750 | switch (AT_class (a)) |
3f76745e JM |
6751 | { |
6752 | case dw_val_class_addr: | |
2e4b9b8c | 6753 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, AT_addr (a), "%s", name); |
3f76745e | 6754 | break; |
a3f97cbb | 6755 | |
a20612aa RH |
6756 | case dw_val_class_offset: |
6757 | dw2_asm_output_data (DWARF_OFFSET_SIZE, a->dw_attr_val.v.val_offset, | |
6758 | "%s", name); | |
6759 | break; | |
6760 | ||
2bee6045 JJ |
6761 | case dw_val_class_range_list: |
6762 | { | |
6763 | char *p = strchr (ranges_section_label, '\0'); | |
6764 | ||
38f9cd4c AJ |
6765 | sprintf (p, "+" HOST_WIDE_INT_PRINT_HEX, |
6766 | a->dw_attr_val.v.val_offset); | |
2bee6045 JJ |
6767 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, ranges_section_label, |
6768 | "%s", name); | |
6769 | *p = '\0'; | |
6770 | } | |
6771 | break; | |
6772 | ||
3f76745e | 6773 | case dw_val_class_loc: |
a96c67ec | 6774 | size = size_of_locs (AT_loc (a)); |
71dfc51f | 6775 | |
3f76745e | 6776 | /* Output the block length for this list of location operations. */ |
2e4b9b8c | 6777 | dw2_asm_output_data (constant_size (size), size, "%s", name); |
71dfc51f | 6778 | |
7d9d8943 | 6779 | output_loc_sequence (AT_loc (a)); |
a3f97cbb | 6780 | break; |
3f76745e JM |
6781 | |
6782 | case dw_val_class_const: | |
25dd13ec JW |
6783 | /* ??? It would be slightly more efficient to use a scheme like is |
6784 | used for unsigned constants below, but gdb 4.x does not sign | |
6785 | extend. Gdb 5.x does sign extend. */ | |
2e4b9b8c | 6786 | dw2_asm_output_data_sleb128 (AT_int (a), "%s", name); |
a3f97cbb | 6787 | break; |
3f76745e JM |
6788 | |
6789 | case dw_val_class_unsigned_const: | |
2e4b9b8c RH |
6790 | dw2_asm_output_data (constant_size (AT_unsigned (a)), |
6791 | AT_unsigned (a), "%s", name); | |
a3f97cbb | 6792 | break; |
3f76745e JM |
6793 | |
6794 | case dw_val_class_long_long: | |
2e4b9b8c RH |
6795 | { |
6796 | unsigned HOST_WIDE_INT first, second; | |
3f76745e | 6797 | |
2ad9852d RK |
6798 | dw2_asm_output_data (1, |
6799 | 2 * HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, | |
c26fbbca | 6800 | "%s", name); |
556273e0 | 6801 | |
2e4b9b8c RH |
6802 | if (WORDS_BIG_ENDIAN) |
6803 | { | |
6804 | first = a->dw_attr_val.v.val_long_long.hi; | |
6805 | second = a->dw_attr_val.v.val_long_long.low; | |
6806 | } | |
6807 | else | |
6808 | { | |
6809 | first = a->dw_attr_val.v.val_long_long.low; | |
6810 | second = a->dw_attr_val.v.val_long_long.hi; | |
6811 | } | |
2ad9852d RK |
6812 | |
6813 | dw2_asm_output_data (HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, | |
2e4b9b8c | 6814 | first, "long long constant"); |
2ad9852d | 6815 | dw2_asm_output_data (HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, |
2e4b9b8c RH |
6816 | second, NULL); |
6817 | } | |
a3f97cbb | 6818 | break; |
3f76745e | 6819 | |
e7ee3914 | 6820 | case dw_val_class_vec: |
c84e2712 | 6821 | { |
e7ee3914 AM |
6822 | unsigned int elt_size = a->dw_attr_val.v.val_vec.elt_size; |
6823 | unsigned int len = a->dw_attr_val.v.val_vec.length; | |
b3694847 | 6824 | unsigned int i; |
e7ee3914 | 6825 | unsigned char *p; |
c84e2712 | 6826 | |
e7ee3914 AM |
6827 | dw2_asm_output_data (1, len * elt_size, "%s", name); |
6828 | if (elt_size > sizeof (HOST_WIDE_INT)) | |
6829 | { | |
6830 | elt_size /= 2; | |
6831 | len *= 2; | |
6832 | } | |
6833 | for (i = 0, p = a->dw_attr_val.v.val_vec.array; | |
6834 | i < len; | |
6835 | i++, p += elt_size) | |
6836 | dw2_asm_output_data (elt_size, extract_int (p, elt_size), | |
6837 | "fp or vector constant word %u", i); | |
556273e0 | 6838 | break; |
c84e2712 | 6839 | } |
3f76745e JM |
6840 | |
6841 | case dw_val_class_flag: | |
2e4b9b8c | 6842 | dw2_asm_output_data (1, AT_flag (a), "%s", name); |
a3f97cbb | 6843 | break; |
a20612aa | 6844 | |
c26fbbca | 6845 | case dw_val_class_loc_list: |
63e46568 DB |
6846 | { |
6847 | char *sym = AT_loc_list (a)->ll_symbol; | |
2ad9852d | 6848 | |
63e46568 | 6849 | if (sym == 0) |
173bf5be | 6850 | abort (); |
1711adc2 | 6851 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, sym, "%s", name); |
63e46568 DB |
6852 | } |
6853 | break; | |
a20612aa | 6854 | |
3f76745e | 6855 | case dw_val_class_die_ref: |
881c6935 | 6856 | if (AT_ref_external (a)) |
2e4b9b8c RH |
6857 | { |
6858 | char *sym = AT_ref (a)->die_symbol; | |
2ad9852d | 6859 | |
2e4b9b8c RH |
6860 | if (sym == 0) |
6861 | abort (); | |
6862 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, sym, "%s", name); | |
6863 | } | |
3f4907a6 JM |
6864 | else if (AT_ref (a)->die_offset == 0) |
6865 | abort (); | |
881c6935 | 6866 | else |
2e4b9b8c RH |
6867 | dw2_asm_output_data (DWARF_OFFSET_SIZE, AT_ref (a)->die_offset, |
6868 | "%s", name); | |
a3f97cbb | 6869 | break; |
3f76745e JM |
6870 | |
6871 | case dw_val_class_fde_ref: | |
a6ab3aad JM |
6872 | { |
6873 | char l1[20]; | |
2ad9852d | 6874 | |
2e4b9b8c RH |
6875 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_LABEL, |
6876 | a->dw_attr_val.v.val_fde_index * 2); | |
6877 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, l1, "%s", name); | |
a6ab3aad | 6878 | } |
a3f97cbb | 6879 | break; |
a3f97cbb | 6880 | |
3f76745e | 6881 | case dw_val_class_lbl_id: |
8e7fa2c8 | 6882 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, AT_lbl (a), "%s", name); |
3f76745e | 6883 | break; |
71dfc51f | 6884 | |
8b790721 | 6885 | case dw_val_class_lbl_offset: |
2e4b9b8c | 6886 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a), "%s", name); |
3f76745e | 6887 | break; |
a3f97cbb | 6888 | |
3f76745e | 6889 | case dw_val_class_str: |
9eb4015a JJ |
6890 | if (AT_string_form (a) == DW_FORM_strp) |
6891 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, | |
6892 | a->dw_attr_val.v.val_str->label, | |
a4cf1d85 | 6893 | "%s: \"%s\"", name, AT_string (a)); |
9eb4015a JJ |
6894 | else |
6895 | dw2_asm_output_nstring (AT_string (a), -1, "%s", name); | |
3f76745e | 6896 | break; |
b2932ae5 | 6897 | |
3f76745e JM |
6898 | default: |
6899 | abort (); | |
6900 | } | |
3f76745e | 6901 | } |
71dfc51f | 6902 | |
3f76745e JM |
6903 | for (c = die->die_child; c != NULL; c = c->die_sib) |
6904 | output_die (c); | |
71dfc51f | 6905 | |
2ad9852d | 6906 | /* Add null byte to terminate sibling list. */ |
3f76745e | 6907 | if (die->die_child != NULL) |
2ad9852d RK |
6908 | dw2_asm_output_data (1, 0, "end of children of DIE 0x%lx", |
6909 | die->die_offset); | |
3f76745e | 6910 | } |
71dfc51f | 6911 | |
3f76745e JM |
6912 | /* Output the compilation unit that appears at the beginning of the |
6913 | .debug_info section, and precedes the DIE descriptions. */ | |
71dfc51f | 6914 | |
3f76745e | 6915 | static void |
7080f735 | 6916 | output_compilation_unit_header (void) |
3f76745e | 6917 | { |
9eb0ef7a KB |
6918 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
6919 | dw2_asm_output_data (4, 0xffffffff, | |
6920 | "Initial length escape value indicating 64-bit DWARF extension"); | |
6921 | dw2_asm_output_data (DWARF_OFFSET_SIZE, | |
6922 | next_die_offset - DWARF_INITIAL_LENGTH_SIZE, | |
2e4b9b8c | 6923 | "Length of Compilation Unit Info"); |
2e4b9b8c | 6924 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF version number"); |
2e4b9b8c RH |
6925 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, abbrev_section_label, |
6926 | "Offset Into Abbrev. Section"); | |
2e4b9b8c | 6927 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Pointer Size (in bytes)"); |
a3f97cbb JW |
6928 | } |
6929 | ||
881c6935 JM |
6930 | /* Output the compilation unit DIE and its children. */ |
6931 | ||
6932 | static void | |
7080f735 | 6933 | output_comp_unit (dw_die_ref die, int output_if_empty) |
881c6935 | 6934 | { |
ce1cc601 | 6935 | const char *secname; |
cc0017a9 ZD |
6936 | char *oldsym, *tmp; |
6937 | ||
6938 | /* Unless we are outputting main CU, we may throw away empty ones. */ | |
6939 | if (!output_if_empty && die->die_child == NULL) | |
6940 | return; | |
881c6935 | 6941 | |
2ad9852d RK |
6942 | /* Even if there are no children of this DIE, we must output the information |
6943 | about the compilation unit. Otherwise, on an empty translation unit, we | |
6944 | will generate a present, but empty, .debug_info section. IRIX 6.5 `nm' | |
6945 | will then complain when examining the file. First mark all the DIEs in | |
6946 | this CU so we know which get local refs. */ | |
1bfb5f8f JM |
6947 | mark_dies (die); |
6948 | ||
6949 | build_abbrev_table (die); | |
6950 | ||
6d2f8887 | 6951 | /* Initialize the beginning DIE offset - and calculate sizes/offsets. */ |
881c6935 JM |
6952 | next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE; |
6953 | calc_die_sizes (die); | |
6954 | ||
cc0017a9 ZD |
6955 | oldsym = die->die_symbol; |
6956 | if (oldsym) | |
881c6935 | 6957 | { |
703ad42b | 6958 | tmp = alloca (strlen (oldsym) + 24); |
2ad9852d | 6959 | |
cc0017a9 | 6960 | sprintf (tmp, ".gnu.linkonce.wi.%s", oldsym); |
ce1cc601 | 6961 | secname = tmp; |
881c6935 JM |
6962 | die->die_symbol = NULL; |
6963 | } | |
6964 | else | |
ce1cc601 | 6965 | secname = (const char *) DEBUG_INFO_SECTION; |
881c6935 JM |
6966 | |
6967 | /* Output debugging information. */ | |
715bdd29 | 6968 | named_section_flags (secname, SECTION_DEBUG); |
881c6935 JM |
6969 | output_compilation_unit_header (); |
6970 | output_die (die); | |
6971 | ||
1bfb5f8f JM |
6972 | /* Leave the marks on the main CU, so we can check them in |
6973 | output_pubnames. */ | |
cc0017a9 ZD |
6974 | if (oldsym) |
6975 | { | |
6976 | unmark_dies (die); | |
6977 | die->die_symbol = oldsym; | |
6978 | } | |
881c6935 JM |
6979 | } |
6980 | ||
7afff7cf NB |
6981 | /* The DWARF2 pubname for a nested thingy looks like "A::f". The |
6982 | output of lang_hooks.decl_printable_name for C++ looks like | |
6983 | "A::f(int)". Let's drop the argument list, and maybe the scope. */ | |
a1d7ffe3 | 6984 | |
d560ee52 | 6985 | static const char * |
7080f735 | 6986 | dwarf2_name (tree decl, int scope) |
a1d7ffe3 | 6987 | { |
ae2bcd98 | 6988 | return lang_hooks.decl_printable_name (decl, scope ? 1 : 0); |
a1d7ffe3 JM |
6989 | } |
6990 | ||
d291dd49 | 6991 | /* Add a new entry to .debug_pubnames if appropriate. */ |
71dfc51f | 6992 | |
d291dd49 | 6993 | static void |
7080f735 | 6994 | add_pubname (tree decl, dw_die_ref die) |
d291dd49 JM |
6995 | { |
6996 | pubname_ref p; | |
6997 | ||
6998 | if (! TREE_PUBLIC (decl)) | |
6999 | return; | |
7000 | ||
7001 | if (pubname_table_in_use == pubname_table_allocated) | |
7002 | { | |
7003 | pubname_table_allocated += PUBNAME_TABLE_INCREMENT; | |
2ad9852d | 7004 | pubname_table |
703ad42b KG |
7005 | = ggc_realloc (pubname_table, |
7006 | (pubname_table_allocated * sizeof (pubname_entry))); | |
17211ab5 GK |
7007 | memset (pubname_table + pubname_table_in_use, 0, |
7008 | PUBNAME_TABLE_INCREMENT * sizeof (pubname_entry)); | |
d291dd49 | 7009 | } |
71dfc51f | 7010 | |
d291dd49 JM |
7011 | p = &pubname_table[pubname_table_in_use++]; |
7012 | p->die = die; | |
a1d7ffe3 | 7013 | p->name = xstrdup (dwarf2_name (decl, 1)); |
d291dd49 JM |
7014 | } |
7015 | ||
a3f97cbb JW |
7016 | /* Output the public names table used to speed up access to externally |
7017 | visible names. For now, only generate entries for externally | |
7018 | visible procedures. */ | |
71dfc51f | 7019 | |
a3f97cbb | 7020 | static void |
7080f735 | 7021 | output_pubnames (void) |
a3f97cbb | 7022 | { |
b3694847 SS |
7023 | unsigned i; |
7024 | unsigned long pubnames_length = size_of_pubnames (); | |
71dfc51f | 7025 | |
9eb0ef7a KB |
7026 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
7027 | dw2_asm_output_data (4, 0xffffffff, | |
7028 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
7029 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length, |
7030 | "Length of Public Names Info"); | |
2e4b9b8c | 7031 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
2e4b9b8c RH |
7032 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
7033 | "Offset of Compilation Unit Info"); | |
2e4b9b8c RH |
7034 | dw2_asm_output_data (DWARF_OFFSET_SIZE, next_die_offset, |
7035 | "Compilation Unit Length"); | |
71dfc51f | 7036 | |
2ad9852d | 7037 | for (i = 0; i < pubname_table_in_use; i++) |
a3f97cbb | 7038 | { |
b3694847 | 7039 | pubname_ref pub = &pubname_table[i]; |
71dfc51f | 7040 | |
881c6935 | 7041 | /* We shouldn't see pubnames for DIEs outside of the main CU. */ |
1bfb5f8f | 7042 | if (pub->die->die_mark == 0) |
881c6935 JM |
7043 | abort (); |
7044 | ||
2e4b9b8c RH |
7045 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pub->die->die_offset, |
7046 | "DIE offset"); | |
71dfc51f | 7047 | |
2e4b9b8c | 7048 | dw2_asm_output_nstring (pub->name, -1, "external name"); |
a3f97cbb | 7049 | } |
71dfc51f | 7050 | |
2e4b9b8c | 7051 | dw2_asm_output_data (DWARF_OFFSET_SIZE, 0, NULL); |
a3f97cbb JW |
7052 | } |
7053 | ||
d291dd49 | 7054 | /* Add a new entry to .debug_aranges if appropriate. */ |
71dfc51f | 7055 | |
d291dd49 | 7056 | static void |
7080f735 | 7057 | add_arange (tree decl, dw_die_ref die) |
d291dd49 JM |
7058 | { |
7059 | if (! DECL_SECTION_NAME (decl)) | |
7060 | return; | |
7061 | ||
7062 | if (arange_table_in_use == arange_table_allocated) | |
7063 | { | |
7064 | arange_table_allocated += ARANGE_TABLE_INCREMENT; | |
7080f735 AJ |
7065 | arange_table = ggc_realloc (arange_table, |
7066 | (arange_table_allocated | |
17211ab5 GK |
7067 | * sizeof (dw_die_ref))); |
7068 | memset (arange_table + arange_table_in_use, 0, | |
7069 | ARANGE_TABLE_INCREMENT * sizeof (dw_die_ref)); | |
d291dd49 | 7070 | } |
71dfc51f | 7071 | |
d291dd49 JM |
7072 | arange_table[arange_table_in_use++] = die; |
7073 | } | |
7074 | ||
a3f97cbb JW |
7075 | /* Output the information that goes into the .debug_aranges table. |
7076 | Namely, define the beginning and ending address range of the | |
7077 | text section generated for this compilation unit. */ | |
71dfc51f | 7078 | |
a3f97cbb | 7079 | static void |
7080f735 | 7080 | output_aranges (void) |
a3f97cbb | 7081 | { |
b3694847 SS |
7082 | unsigned i; |
7083 | unsigned long aranges_length = size_of_aranges (); | |
71dfc51f | 7084 | |
9eb0ef7a KB |
7085 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
7086 | dw2_asm_output_data (4, 0xffffffff, | |
7087 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
7088 | dw2_asm_output_data (DWARF_OFFSET_SIZE, aranges_length, |
7089 | "Length of Address Ranges Info"); | |
2e4b9b8c | 7090 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
2e4b9b8c RH |
7091 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
7092 | "Offset of Compilation Unit Info"); | |
2e4b9b8c | 7093 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Size of Address"); |
2e4b9b8c | 7094 | dw2_asm_output_data (1, 0, "Size of Segment Descriptor"); |
71dfc51f | 7095 | |
262b6384 SC |
7096 | /* We need to align to twice the pointer size here. */ |
7097 | if (DWARF_ARANGES_PAD_SIZE) | |
7098 | { | |
2e4b9b8c | 7099 | /* Pad using a 2 byte words so that padding is correct for any |
73c68f61 | 7100 | pointer size. */ |
2e4b9b8c RH |
7101 | dw2_asm_output_data (2, 0, "Pad to %d byte boundary", |
7102 | 2 * DWARF2_ADDR_SIZE); | |
770ca8c6 | 7103 | for (i = 2; i < (unsigned) DWARF_ARANGES_PAD_SIZE; i += 2) |
2e4b9b8c | 7104 | dw2_asm_output_data (2, 0, NULL); |
262b6384 | 7105 | } |
71dfc51f | 7106 | |
8e7fa2c8 | 7107 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_section_label, "Address"); |
2e4b9b8c RH |
7108 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label, |
7109 | text_section_label, "Length"); | |
71dfc51f | 7110 | |
2ad9852d | 7111 | for (i = 0; i < arange_table_in_use; i++) |
d291dd49 | 7112 | { |
e689ae67 | 7113 | dw_die_ref die = arange_table[i]; |
71dfc51f | 7114 | |
881c6935 | 7115 | /* We shouldn't see aranges for DIEs outside of the main CU. */ |
1bfb5f8f | 7116 | if (die->die_mark == 0) |
881c6935 JM |
7117 | abort (); |
7118 | ||
e689ae67 | 7119 | if (die->die_tag == DW_TAG_subprogram) |
2e4b9b8c | 7120 | { |
8e7fa2c8 | 7121 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, get_AT_low_pc (die), |
173bf5be | 7122 | "Address"); |
2e4b9b8c RH |
7123 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, get_AT_hi_pc (die), |
7124 | get_AT_low_pc (die), "Length"); | |
7125 | } | |
d291dd49 | 7126 | else |
a1d7ffe3 | 7127 | { |
e689ae67 JM |
7128 | /* A static variable; extract the symbol from DW_AT_location. |
7129 | Note that this code isn't currently hit, as we only emit | |
7130 | aranges for functions (jason 9/23/99). */ | |
e689ae67 JM |
7131 | dw_attr_ref a = get_AT (die, DW_AT_location); |
7132 | dw_loc_descr_ref loc; | |
2ad9852d | 7133 | |
a96c67ec | 7134 | if (! a || AT_class (a) != dw_val_class_loc) |
e689ae67 JM |
7135 | abort (); |
7136 | ||
a96c67ec | 7137 | loc = AT_loc (a); |
e689ae67 JM |
7138 | if (loc->dw_loc_opc != DW_OP_addr) |
7139 | abort (); | |
7140 | ||
2e4b9b8c RH |
7141 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, |
7142 | loc->dw_loc_oprnd1.v.val_addr, "Address"); | |
7143 | dw2_asm_output_data (DWARF2_ADDR_SIZE, | |
7144 | get_AT_unsigned (die, DW_AT_byte_size), | |
7145 | "Length"); | |
a1d7ffe3 | 7146 | } |
d291dd49 | 7147 | } |
71dfc51f | 7148 | |
a3f97cbb | 7149 | /* Output the terminator words. */ |
2e4b9b8c RH |
7150 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); |
7151 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
a3f97cbb JW |
7152 | } |
7153 | ||
a20612aa RH |
7154 | /* Add a new entry to .debug_ranges. Return the offset at which it |
7155 | was placed. */ | |
7156 | ||
7157 | static unsigned int | |
7080f735 | 7158 | add_ranges (tree block) |
a20612aa RH |
7159 | { |
7160 | unsigned int in_use = ranges_table_in_use; | |
7161 | ||
7162 | if (in_use == ranges_table_allocated) | |
7163 | { | |
7164 | ranges_table_allocated += RANGES_TABLE_INCREMENT; | |
703ad42b KG |
7165 | ranges_table |
7166 | = ggc_realloc (ranges_table, (ranges_table_allocated | |
7167 | * sizeof (struct dw_ranges_struct))); | |
17211ab5 GK |
7168 | memset (ranges_table + ranges_table_in_use, 0, |
7169 | RANGES_TABLE_INCREMENT * sizeof (struct dw_ranges_struct)); | |
a20612aa RH |
7170 | } |
7171 | ||
7172 | ranges_table[in_use].block_num = (block ? BLOCK_NUMBER (block) : 0); | |
7173 | ranges_table_in_use = in_use + 1; | |
7174 | ||
7175 | return in_use * 2 * DWARF2_ADDR_SIZE; | |
7176 | } | |
7177 | ||
7178 | static void | |
7080f735 | 7179 | output_ranges (void) |
a20612aa | 7180 | { |
b3694847 | 7181 | unsigned i; |
83182544 | 7182 | static const char *const start_fmt = "Offset 0x%x"; |
a20612aa RH |
7183 | const char *fmt = start_fmt; |
7184 | ||
2ad9852d | 7185 | for (i = 0; i < ranges_table_in_use; i++) |
a20612aa RH |
7186 | { |
7187 | int block_num = ranges_table[i].block_num; | |
7188 | ||
7189 | if (block_num) | |
7190 | { | |
7191 | char blabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
7192 | char elabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
7193 | ||
7194 | ASM_GENERATE_INTERNAL_LABEL (blabel, BLOCK_BEGIN_LABEL, block_num); | |
7195 | ASM_GENERATE_INTERNAL_LABEL (elabel, BLOCK_END_LABEL, block_num); | |
7196 | ||
7197 | /* If all code is in the text section, then the compilation | |
7198 | unit base address defaults to DW_AT_low_pc, which is the | |
7199 | base of the text section. */ | |
7200 | if (separate_line_info_table_in_use == 0) | |
7201 | { | |
7202 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, blabel, | |
7203 | text_section_label, | |
7204 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
7205 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, elabel, | |
7206 | text_section_label, NULL); | |
7207 | } | |
2ad9852d | 7208 | |
a20612aa RH |
7209 | /* Otherwise, we add a DW_AT_entry_pc attribute to force the |
7210 | compilation unit base address to zero, which allows us to | |
7211 | use absolute addresses, and not worry about whether the | |
7212 | target supports cross-section arithmetic. */ | |
7213 | else | |
7214 | { | |
7215 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, blabel, | |
7216 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
7217 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, elabel, NULL); | |
7218 | } | |
7219 | ||
7220 | fmt = NULL; | |
7221 | } | |
7222 | else | |
7223 | { | |
7224 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
7225 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
7226 | fmt = start_fmt; | |
7227 | } | |
7228 | } | |
7229 | } | |
0b34cf1e UD |
7230 | |
7231 | /* Data structure containing information about input files. */ | |
7232 | struct file_info | |
7233 | { | |
7234 | char *path; /* Complete file name. */ | |
7235 | char *fname; /* File name part. */ | |
7236 | int length; /* Length of entire string. */ | |
7237 | int file_idx; /* Index in input file table. */ | |
7238 | int dir_idx; /* Index in directory table. */ | |
7239 | }; | |
7240 | ||
7241 | /* Data structure containing information about directories with source | |
7242 | files. */ | |
7243 | struct dir_info | |
7244 | { | |
7245 | char *path; /* Path including directory name. */ | |
7246 | int length; /* Path length. */ | |
7247 | int prefix; /* Index of directory entry which is a prefix. */ | |
0b34cf1e UD |
7248 | int count; /* Number of files in this directory. */ |
7249 | int dir_idx; /* Index of directory used as base. */ | |
7250 | int used; /* Used in the end? */ | |
7251 | }; | |
7252 | ||
7253 | /* Callback function for file_info comparison. We sort by looking at | |
7254 | the directories in the path. */ | |
356b0698 | 7255 | |
0b34cf1e | 7256 | static int |
7080f735 | 7257 | file_info_cmp (const void *p1, const void *p2) |
0b34cf1e UD |
7258 | { |
7259 | const struct file_info *s1 = p1; | |
7260 | const struct file_info *s2 = p2; | |
7261 | unsigned char *cp1; | |
7262 | unsigned char *cp2; | |
7263 | ||
356b0698 RK |
7264 | /* Take care of file names without directories. We need to make sure that |
7265 | we return consistent values to qsort since some will get confused if | |
7266 | we return the same value when identical operands are passed in opposite | |
7267 | orders. So if neither has a directory, return 0 and otherwise return | |
7268 | 1 or -1 depending on which one has the directory. */ | |
7269 | if ((s1->path == s1->fname || s2->path == s2->fname)) | |
7270 | return (s2->path == s2->fname) - (s1->path == s1->fname); | |
0b34cf1e UD |
7271 | |
7272 | cp1 = (unsigned char *) s1->path; | |
7273 | cp2 = (unsigned char *) s2->path; | |
7274 | ||
7275 | while (1) | |
7276 | { | |
7277 | ++cp1; | |
7278 | ++cp2; | |
356b0698 RK |
7279 | /* Reached the end of the first path? If so, handle like above. */ |
7280 | if ((cp1 == (unsigned char *) s1->fname) | |
7281 | || (cp2 == (unsigned char *) s2->fname)) | |
7282 | return ((cp2 == (unsigned char *) s2->fname) | |
7283 | - (cp1 == (unsigned char *) s1->fname)); | |
0b34cf1e UD |
7284 | |
7285 | /* Character of current path component the same? */ | |
356b0698 | 7286 | else if (*cp1 != *cp2) |
0b34cf1e UD |
7287 | return *cp1 - *cp2; |
7288 | } | |
7289 | } | |
7290 | ||
7291 | /* Output the directory table and the file name table. We try to minimize | |
7292 | the total amount of memory needed. A heuristic is used to avoid large | |
7293 | slowdowns with many input files. */ | |
2ad9852d | 7294 | |
0b34cf1e | 7295 | static void |
7080f735 | 7296 | output_file_names (void) |
0b34cf1e UD |
7297 | { |
7298 | struct file_info *files; | |
7299 | struct dir_info *dirs; | |
7300 | int *saved; | |
7301 | int *savehere; | |
7302 | int *backmap; | |
c4274b22 | 7303 | size_t ndirs; |
0b34cf1e | 7304 | int idx_offset; |
c4274b22 | 7305 | size_t i; |
0b34cf1e UD |
7306 | int idx; |
7307 | ||
f0b886ab UW |
7308 | /* Handle the case where file_table is empty. */ |
7309 | if (VARRAY_ACTIVE_SIZE (file_table) <= 1) | |
7310 | { | |
7311 | dw2_asm_output_data (1, 0, "End directory table"); | |
7312 | dw2_asm_output_data (1, 0, "End file name table"); | |
7313 | return; | |
7314 | } | |
7315 | ||
0b34cf1e | 7316 | /* Allocate the various arrays we need. */ |
703ad42b KG |
7317 | files = alloca (VARRAY_ACTIVE_SIZE (file_table) * sizeof (struct file_info)); |
7318 | dirs = alloca (VARRAY_ACTIVE_SIZE (file_table) * sizeof (struct dir_info)); | |
0b34cf1e UD |
7319 | |
7320 | /* Sort the file names. */ | |
c4274b22 | 7321 | for (i = 1; i < VARRAY_ACTIVE_SIZE (file_table); i++) |
0b34cf1e UD |
7322 | { |
7323 | char *f; | |
7324 | ||
7325 | /* Skip all leading "./". */ | |
c4274b22 | 7326 | f = VARRAY_CHAR_PTR (file_table, i); |
0b34cf1e UD |
7327 | while (f[0] == '.' && f[1] == '/') |
7328 | f += 2; | |
7329 | ||
7330 | /* Create a new array entry. */ | |
7331 | files[i].path = f; | |
7332 | files[i].length = strlen (f); | |
7333 | files[i].file_idx = i; | |
7334 | ||
7335 | /* Search for the file name part. */ | |
7336 | f = strrchr (f, '/'); | |
7337 | files[i].fname = f == NULL ? files[i].path : f + 1; | |
7338 | } | |
2ad9852d | 7339 | |
c4274b22 RH |
7340 | qsort (files + 1, VARRAY_ACTIVE_SIZE (file_table) - 1, |
7341 | sizeof (files[0]), file_info_cmp); | |
0b34cf1e UD |
7342 | |
7343 | /* Find all the different directories used. */ | |
7344 | dirs[0].path = files[1].path; | |
7345 | dirs[0].length = files[1].fname - files[1].path; | |
7346 | dirs[0].prefix = -1; | |
0b34cf1e UD |
7347 | dirs[0].count = 1; |
7348 | dirs[0].dir_idx = 0; | |
7349 | dirs[0].used = 0; | |
7350 | files[1].dir_idx = 0; | |
7351 | ndirs = 1; | |
7352 | ||
c4274b22 | 7353 | for (i = 2; i < VARRAY_ACTIVE_SIZE (file_table); i++) |
0b34cf1e UD |
7354 | if (files[i].fname - files[i].path == dirs[ndirs - 1].length |
7355 | && memcmp (dirs[ndirs - 1].path, files[i].path, | |
7356 | dirs[ndirs - 1].length) == 0) | |
7357 | { | |
7358 | /* Same directory as last entry. */ | |
7359 | files[i].dir_idx = ndirs - 1; | |
0b34cf1e UD |
7360 | ++dirs[ndirs - 1].count; |
7361 | } | |
7362 | else | |
7363 | { | |
c4274b22 | 7364 | size_t j; |
0b34cf1e UD |
7365 | |
7366 | /* This is a new directory. */ | |
7367 | dirs[ndirs].path = files[i].path; | |
7368 | dirs[ndirs].length = files[i].fname - files[i].path; | |
0b34cf1e UD |
7369 | dirs[ndirs].count = 1; |
7370 | dirs[ndirs].dir_idx = ndirs; | |
7371 | dirs[ndirs].used = 0; | |
7372 | files[i].dir_idx = ndirs; | |
7373 | ||
7374 | /* Search for a prefix. */ | |
981975b6 | 7375 | dirs[ndirs].prefix = -1; |
2ad9852d | 7376 | for (j = 0; j < ndirs; j++) |
981975b6 RH |
7377 | if (dirs[j].length < dirs[ndirs].length |
7378 | && dirs[j].length > 1 | |
7379 | && (dirs[ndirs].prefix == -1 | |
7380 | || dirs[j].length > dirs[dirs[ndirs].prefix].length) | |
7381 | && memcmp (dirs[j].path, dirs[ndirs].path, dirs[j].length) == 0) | |
7382 | dirs[ndirs].prefix = j; | |
0b34cf1e UD |
7383 | |
7384 | ++ndirs; | |
7385 | } | |
7386 | ||
2ad9852d RK |
7387 | /* Now to the actual work. We have to find a subset of the directories which |
7388 | allow expressing the file name using references to the directory table | |
7389 | with the least amount of characters. We do not do an exhaustive search | |
7390 | where we would have to check out every combination of every single | |
7391 | possible prefix. Instead we use a heuristic which provides nearly optimal | |
7392 | results in most cases and never is much off. */ | |
703ad42b KG |
7393 | saved = alloca (ndirs * sizeof (int)); |
7394 | savehere = alloca (ndirs * sizeof (int)); | |
0b34cf1e UD |
7395 | |
7396 | memset (saved, '\0', ndirs * sizeof (saved[0])); | |
2ad9852d | 7397 | for (i = 0; i < ndirs; i++) |
0b34cf1e | 7398 | { |
c4274b22 | 7399 | size_t j; |
0b34cf1e UD |
7400 | int total; |
7401 | ||
2ad9852d RK |
7402 | /* We can always save some space for the current directory. But this |
7403 | does not mean it will be enough to justify adding the directory. */ | |
0b34cf1e UD |
7404 | savehere[i] = dirs[i].length; |
7405 | total = (savehere[i] - saved[i]) * dirs[i].count; | |
7406 | ||
2ad9852d | 7407 | for (j = i + 1; j < ndirs; j++) |
0b34cf1e UD |
7408 | { |
7409 | savehere[j] = 0; | |
0b34cf1e UD |
7410 | if (saved[j] < dirs[i].length) |
7411 | { | |
7412 | /* Determine whether the dirs[i] path is a prefix of the | |
7413 | dirs[j] path. */ | |
7414 | int k; | |
7415 | ||
981975b6 | 7416 | k = dirs[j].prefix; |
c4274b22 | 7417 | while (k != -1 && k != (int) i) |
981975b6 RH |
7418 | k = dirs[k].prefix; |
7419 | ||
c4274b22 | 7420 | if (k == (int) i) |
981975b6 RH |
7421 | { |
7422 | /* Yes it is. We can possibly safe some memory but | |
7423 | writing the filenames in dirs[j] relative to | |
7424 | dirs[i]. */ | |
7425 | savehere[j] = dirs[i].length; | |
7426 | total += (savehere[j] - saved[j]) * dirs[j].count; | |
7427 | } | |
0b34cf1e UD |
7428 | } |
7429 | } | |
7430 | ||
7431 | /* Check whether we can safe enough to justify adding the dirs[i] | |
7432 | directory. */ | |
7433 | if (total > dirs[i].length + 1) | |
7434 | { | |
981975b6 | 7435 | /* It's worthwhile adding. */ |
c26fbbca | 7436 | for (j = i; j < ndirs; j++) |
0b34cf1e UD |
7437 | if (savehere[j] > 0) |
7438 | { | |
7439 | /* Remember how much we saved for this directory so far. */ | |
7440 | saved[j] = savehere[j]; | |
7441 | ||
7442 | /* Remember the prefix directory. */ | |
7443 | dirs[j].dir_idx = i; | |
7444 | } | |
7445 | } | |
7446 | } | |
7447 | ||
2ad9852d RK |
7448 | /* We have to emit them in the order they appear in the file_table array |
7449 | since the index is used in the debug info generation. To do this | |
7450 | efficiently we generate a back-mapping of the indices first. */ | |
703ad42b | 7451 | backmap = alloca (VARRAY_ACTIVE_SIZE (file_table) * sizeof (int)); |
c4274b22 | 7452 | for (i = 1; i < VARRAY_ACTIVE_SIZE (file_table); i++) |
0b34cf1e UD |
7453 | { |
7454 | backmap[files[i].file_idx] = i; | |
2ad9852d | 7455 | |
0b34cf1e UD |
7456 | /* Mark this directory as used. */ |
7457 | dirs[dirs[files[i].dir_idx].dir_idx].used = 1; | |
7458 | } | |
7459 | ||
2ad9852d RK |
7460 | /* That was it. We are ready to emit the information. First emit the |
7461 | directory name table. We have to make sure the first actually emitted | |
7462 | directory name has index one; zero is reserved for the current working | |
7463 | directory. Make sure we do not confuse these indices with the one for the | |
7464 | constructed table (even though most of the time they are identical). */ | |
0b34cf1e | 7465 | idx = 1; |
e57cabac | 7466 | idx_offset = dirs[0].length > 0 ? 1 : 0; |
2ad9852d | 7467 | for (i = 1 - idx_offset; i < ndirs; i++) |
0b34cf1e UD |
7468 | if (dirs[i].used != 0) |
7469 | { | |
7470 | dirs[i].used = idx++; | |
2e4b9b8c RH |
7471 | dw2_asm_output_nstring (dirs[i].path, dirs[i].length - 1, |
7472 | "Directory Entry: 0x%x", dirs[i].used); | |
0b34cf1e | 7473 | } |
2ad9852d | 7474 | |
2e4b9b8c RH |
7475 | dw2_asm_output_data (1, 0, "End directory table"); |
7476 | ||
0b34cf1e UD |
7477 | /* Correct the index for the current working directory entry if it |
7478 | exists. */ | |
7479 | if (idx_offset == 0) | |
7480 | dirs[0].used = 0; | |
0b34cf1e UD |
7481 | |
7482 | /* Now write all the file names. */ | |
c4274b22 | 7483 | for (i = 1; i < VARRAY_ACTIVE_SIZE (file_table); i++) |
0b34cf1e UD |
7484 | { |
7485 | int file_idx = backmap[i]; | |
7486 | int dir_idx = dirs[files[file_idx].dir_idx].dir_idx; | |
7487 | ||
2e4b9b8c | 7488 | dw2_asm_output_nstring (files[file_idx].path + dirs[dir_idx].length, -1, |
94e001a9 | 7489 | "File Entry: 0x%lx", (unsigned long) i); |
0b34cf1e UD |
7490 | |
7491 | /* Include directory index. */ | |
2e4b9b8c | 7492 | dw2_asm_output_data_uleb128 (dirs[dir_idx].used, NULL); |
0b34cf1e UD |
7493 | |
7494 | /* Modification time. */ | |
2e4b9b8c | 7495 | dw2_asm_output_data_uleb128 (0, NULL); |
0b34cf1e UD |
7496 | |
7497 | /* File length in bytes. */ | |
2e4b9b8c | 7498 | dw2_asm_output_data_uleb128 (0, NULL); |
0b34cf1e | 7499 | } |
2ad9852d | 7500 | |
2e4b9b8c | 7501 | dw2_asm_output_data (1, 0, "End file name table"); |
0b34cf1e UD |
7502 | } |
7503 | ||
7504 | ||
a3f97cbb | 7505 | /* Output the source line number correspondence information. This |
14a774a9 | 7506 | information goes into the .debug_line section. */ |
71dfc51f | 7507 | |
a3f97cbb | 7508 | static void |
7080f735 | 7509 | output_line_info (void) |
a3f97cbb | 7510 | { |
981975b6 | 7511 | char l1[20], l2[20], p1[20], p2[20]; |
a3f97cbb JW |
7512 | char line_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
7513 | char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
b3694847 SS |
7514 | unsigned opc; |
7515 | unsigned n_op_args; | |
7516 | unsigned long lt_index; | |
7517 | unsigned long current_line; | |
7518 | long line_offset; | |
7519 | long line_delta; | |
7520 | unsigned long current_file; | |
7521 | unsigned long function; | |
71dfc51f | 7522 | |
2e4b9b8c RH |
7523 | ASM_GENERATE_INTERNAL_LABEL (l1, LINE_NUMBER_BEGIN_LABEL, 0); |
7524 | ASM_GENERATE_INTERNAL_LABEL (l2, LINE_NUMBER_END_LABEL, 0); | |
981975b6 RH |
7525 | ASM_GENERATE_INTERNAL_LABEL (p1, LN_PROLOG_AS_LABEL, 0); |
7526 | ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL, 0); | |
71dfc51f | 7527 | |
9eb0ef7a KB |
7528 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
7529 | dw2_asm_output_data (4, 0xffffffff, | |
7530 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
7531 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, l2, l1, |
7532 | "Length of Source Line Info"); | |
7533 | ASM_OUTPUT_LABEL (asm_out_file, l1); | |
71dfc51f | 7534 | |
2e4b9b8c | 7535 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
981975b6 RH |
7536 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, p2, p1, "Prolog Length"); |
7537 | ASM_OUTPUT_LABEL (asm_out_file, p1); | |
71dfc51f | 7538 | |
c1a046e5 TT |
7539 | /* Define the architecture-dependent minimum instruction length (in |
7540 | bytes). In this implementation of DWARF, this field is used for | |
7541 | information purposes only. Since GCC generates assembly language, | |
7542 | we have no a priori knowledge of how many instruction bytes are | |
7543 | generated for each source line, and therefore can use only the | |
7544 | DW_LNE_set_address and DW_LNS_fixed_advance_pc line information | |
7545 | commands. Accordingly, we fix this as `1', which is "correct | |
7546 | enough" for all architectures, and don't let the target override. */ | |
7547 | dw2_asm_output_data (1, 1, | |
2e4b9b8c | 7548 | "Minimum Instruction Length"); |
c1a046e5 | 7549 | |
2e4b9b8c RH |
7550 | dw2_asm_output_data (1, DWARF_LINE_DEFAULT_IS_STMT_START, |
7551 | "Default is_stmt_start flag"); | |
2e4b9b8c RH |
7552 | dw2_asm_output_data (1, DWARF_LINE_BASE, |
7553 | "Line Base Value (Special Opcodes)"); | |
2e4b9b8c RH |
7554 | dw2_asm_output_data (1, DWARF_LINE_RANGE, |
7555 | "Line Range Value (Special Opcodes)"); | |
2e4b9b8c RH |
7556 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE, |
7557 | "Special Opcode Base"); | |
71dfc51f | 7558 | |
2ad9852d | 7559 | for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; opc++) |
a3f97cbb JW |
7560 | { |
7561 | switch (opc) | |
7562 | { | |
7563 | case DW_LNS_advance_pc: | |
7564 | case DW_LNS_advance_line: | |
7565 | case DW_LNS_set_file: | |
7566 | case DW_LNS_set_column: | |
7567 | case DW_LNS_fixed_advance_pc: | |
7568 | n_op_args = 1; | |
7569 | break; | |
7570 | default: | |
7571 | n_op_args = 0; | |
7572 | break; | |
7573 | } | |
2e4b9b8c RH |
7574 | |
7575 | dw2_asm_output_data (1, n_op_args, "opcode: 0x%x has %d args", | |
7576 | opc, n_op_args); | |
a3f97cbb | 7577 | } |
71dfc51f | 7578 | |
0b34cf1e UD |
7579 | /* Write out the information about the files we use. */ |
7580 | output_file_names (); | |
981975b6 | 7581 | ASM_OUTPUT_LABEL (asm_out_file, p2); |
a3f97cbb | 7582 | |
2f22d404 JM |
7583 | /* We used to set the address register to the first location in the text |
7584 | section here, but that didn't accomplish anything since we already | |
7585 | have a line note for the opening brace of the first function. */ | |
a3f97cbb JW |
7586 | |
7587 | /* Generate the line number to PC correspondence table, encoded as | |
7588 | a series of state machine operations. */ | |
7589 | current_file = 1; | |
7590 | current_line = 1; | |
8b790721 | 7591 | strcpy (prev_line_label, text_section_label); |
a3f97cbb JW |
7592 | for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index) |
7593 | { | |
b3694847 | 7594 | dw_line_info_ref line_info = &line_info_table[lt_index]; |
2f22d404 | 7595 | |
10a11b75 JM |
7596 | #if 0 |
7597 | /* Disable this optimization for now; GDB wants to see two line notes | |
7598 | at the beginning of a function so it can find the end of the | |
7599 | prologue. */ | |
7600 | ||
2f22d404 | 7601 | /* Don't emit anything for redundant notes. Just updating the |
73c68f61 SS |
7602 | address doesn't accomplish anything, because we already assume |
7603 | that anything after the last address is this line. */ | |
2f22d404 JM |
7604 | if (line_info->dw_line_num == current_line |
7605 | && line_info->dw_file_num == current_file) | |
7606 | continue; | |
10a11b75 | 7607 | #endif |
71dfc51f | 7608 | |
2e4b9b8c RH |
7609 | /* Emit debug info for the address of the current line. |
7610 | ||
7611 | Unfortunately, we have little choice here currently, and must always | |
2ad9852d | 7612 | use the most general form. GCC does not know the address delta |
2e4b9b8c RH |
7613 | itself, so we can't use DW_LNS_advance_pc. Many ports do have length |
7614 | attributes which will give an upper bound on the address range. We | |
7615 | could perhaps use length attributes to determine when it is safe to | |
7616 | use DW_LNS_fixed_advance_pc. */ | |
7617 | ||
5c90448c | 7618 | ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index); |
f19a6894 JW |
7619 | if (0) |
7620 | { | |
7621 | /* This can handle deltas up to 0xffff. This takes 3 bytes. */ | |
2e4b9b8c RH |
7622 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
7623 | "DW_LNS_fixed_advance_pc"); | |
7624 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
7625 | } |
7626 | else | |
7627 | { | |
a1a4189d | 7628 | /* This can handle any delta. This takes |
73c68f61 | 7629 | 4+DWARF2_ADDR_SIZE bytes. */ |
2e4b9b8c RH |
7630 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
7631 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
7632 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 7633 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
f19a6894 | 7634 | } |
2ad9852d | 7635 | |
f19a6894 JW |
7636 | strcpy (prev_line_label, line_label); |
7637 | ||
7638 | /* Emit debug info for the source file of the current line, if | |
7639 | different from the previous line. */ | |
a3f97cbb JW |
7640 | if (line_info->dw_file_num != current_file) |
7641 | { | |
7642 | current_file = line_info->dw_file_num; | |
2e4b9b8c RH |
7643 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
7644 | dw2_asm_output_data_uleb128 (current_file, "(\"%s\")", | |
c4274b22 RH |
7645 | VARRAY_CHAR_PTR (file_table, |
7646 | current_file)); | |
a3f97cbb | 7647 | } |
71dfc51f | 7648 | |
f19a6894 JW |
7649 | /* Emit debug info for the current line number, choosing the encoding |
7650 | that uses the least amount of space. */ | |
2f22d404 | 7651 | if (line_info->dw_line_num != current_line) |
a3f97cbb | 7652 | { |
2f22d404 JM |
7653 | line_offset = line_info->dw_line_num - current_line; |
7654 | line_delta = line_offset - DWARF_LINE_BASE; | |
7655 | current_line = line_info->dw_line_num; | |
7656 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
2ad9852d RK |
7657 | /* This can handle deltas from -10 to 234, using the current |
7658 | definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This | |
7659 | takes 1 byte. */ | |
7660 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, | |
7661 | "line %lu", current_line); | |
2f22d404 JM |
7662 | else |
7663 | { | |
7664 | /* This can handle any delta. This takes at least 4 bytes, | |
7665 | depending on the value being encoded. */ | |
2e4b9b8c RH |
7666 | dw2_asm_output_data (1, DW_LNS_advance_line, |
7667 | "advance to line %lu", current_line); | |
7668 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
7669 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
2f22d404 | 7670 | } |
a94dbf2c JM |
7671 | } |
7672 | else | |
2ad9852d RK |
7673 | /* We still need to start a new row, so output a copy insn. */ |
7674 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
a3f97cbb JW |
7675 | } |
7676 | ||
f19a6894 JW |
7677 | /* Emit debug info for the address of the end of the function. */ |
7678 | if (0) | |
7679 | { | |
2e4b9b8c RH |
7680 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
7681 | "DW_LNS_fixed_advance_pc"); | |
7682 | dw2_asm_output_delta (2, text_end_label, prev_line_label, NULL); | |
f19a6894 JW |
7683 | } |
7684 | else | |
7685 | { | |
2e4b9b8c RH |
7686 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
7687 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
7688 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 7689 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_end_label, NULL); |
f19a6894 | 7690 | } |
bdb669cb | 7691 | |
2e4b9b8c RH |
7692 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
7693 | dw2_asm_output_data_uleb128 (1, NULL); | |
7694 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
e90b62db JM |
7695 | |
7696 | function = 0; | |
7697 | current_file = 1; | |
7698 | current_line = 1; | |
556273e0 | 7699 | for (lt_index = 0; lt_index < separate_line_info_table_in_use;) |
e90b62db | 7700 | { |
b3694847 | 7701 | dw_separate_line_info_ref line_info |
e90b62db | 7702 | = &separate_line_info_table[lt_index]; |
71dfc51f | 7703 | |
10a11b75 | 7704 | #if 0 |
2f22d404 JM |
7705 | /* Don't emit anything for redundant notes. */ |
7706 | if (line_info->dw_line_num == current_line | |
7707 | && line_info->dw_file_num == current_file | |
7708 | && line_info->function == function) | |
7709 | goto cont; | |
10a11b75 | 7710 | #endif |
2f22d404 | 7711 | |
f19a6894 JW |
7712 | /* Emit debug info for the address of the current line. If this is |
7713 | a new function, or the first line of a function, then we need | |
7714 | to handle it differently. */ | |
5c90448c JM |
7715 | ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL, |
7716 | lt_index); | |
e90b62db JM |
7717 | if (function != line_info->function) |
7718 | { | |
7719 | function = line_info->function; | |
71dfc51f | 7720 | |
f9da5064 | 7721 | /* Set the address register to the first line in the function. */ |
2e4b9b8c RH |
7722 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
7723 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
7724 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 7725 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
e90b62db JM |
7726 | } |
7727 | else | |
7728 | { | |
f19a6894 JW |
7729 | /* ??? See the DW_LNS_advance_pc comment above. */ |
7730 | if (0) | |
7731 | { | |
2e4b9b8c RH |
7732 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
7733 | "DW_LNS_fixed_advance_pc"); | |
7734 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
7735 | } |
7736 | else | |
7737 | { | |
2e4b9b8c RH |
7738 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
7739 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
7740 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 7741 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
f19a6894 | 7742 | } |
e90b62db | 7743 | } |
2ad9852d | 7744 | |
f19a6894 | 7745 | strcpy (prev_line_label, line_label); |
71dfc51f | 7746 | |
f19a6894 JW |
7747 | /* Emit debug info for the source file of the current line, if |
7748 | different from the previous line. */ | |
e90b62db JM |
7749 | if (line_info->dw_file_num != current_file) |
7750 | { | |
7751 | current_file = line_info->dw_file_num; | |
2e4b9b8c RH |
7752 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
7753 | dw2_asm_output_data_uleb128 (current_file, "(\"%s\")", | |
c4274b22 RH |
7754 | VARRAY_CHAR_PTR (file_table, |
7755 | current_file)); | |
e90b62db | 7756 | } |
71dfc51f | 7757 | |
f19a6894 JW |
7758 | /* Emit debug info for the current line number, choosing the encoding |
7759 | that uses the least amount of space. */ | |
e90b62db JM |
7760 | if (line_info->dw_line_num != current_line) |
7761 | { | |
7762 | line_offset = line_info->dw_line_num - current_line; | |
7763 | line_delta = line_offset - DWARF_LINE_BASE; | |
7764 | current_line = line_info->dw_line_num; | |
7765 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
2e4b9b8c RH |
7766 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, |
7767 | "line %lu", current_line); | |
e90b62db JM |
7768 | else |
7769 | { | |
2e4b9b8c RH |
7770 | dw2_asm_output_data (1, DW_LNS_advance_line, |
7771 | "advance to line %lu", current_line); | |
7772 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
7773 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
e90b62db JM |
7774 | } |
7775 | } | |
2f22d404 | 7776 | else |
2e4b9b8c | 7777 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); |
71dfc51f | 7778 | |
10a11b75 | 7779 | #if 0 |
2f22d404 | 7780 | cont: |
10a11b75 | 7781 | #endif |
2ad9852d RK |
7782 | |
7783 | lt_index++; | |
e90b62db JM |
7784 | |
7785 | /* If we're done with a function, end its sequence. */ | |
7786 | if (lt_index == separate_line_info_table_in_use | |
7787 | || separate_line_info_table[lt_index].function != function) | |
7788 | { | |
7789 | current_file = 1; | |
7790 | current_line = 1; | |
71dfc51f | 7791 | |
f19a6894 | 7792 | /* Emit debug info for the address of the end of the function. */ |
5c90448c | 7793 | ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function); |
f19a6894 JW |
7794 | if (0) |
7795 | { | |
2e4b9b8c RH |
7796 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
7797 | "DW_LNS_fixed_advance_pc"); | |
7798 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
7799 | } |
7800 | else | |
7801 | { | |
2e4b9b8c RH |
7802 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
7803 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
7804 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 7805 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
f19a6894 | 7806 | } |
e90b62db JM |
7807 | |
7808 | /* Output the marker for the end of this sequence. */ | |
2e4b9b8c RH |
7809 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
7810 | dw2_asm_output_data_uleb128 (1, NULL); | |
7811 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
e90b62db JM |
7812 | } |
7813 | } | |
f19f17e0 JM |
7814 | |
7815 | /* Output the marker for the end of the line number info. */ | |
2e4b9b8c | 7816 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
a3f97cbb JW |
7817 | } |
7818 | \f | |
a3f97cbb JW |
7819 | /* Given a pointer to a tree node for some base type, return a pointer to |
7820 | a DIE that describes the given type. | |
7821 | ||
7822 | This routine must only be called for GCC type nodes that correspond to | |
7823 | Dwarf base (fundamental) types. */ | |
71dfc51f | 7824 | |
a3f97cbb | 7825 | static dw_die_ref |
7080f735 | 7826 | base_type_die (tree type) |
a3f97cbb | 7827 | { |
b3694847 SS |
7828 | dw_die_ref base_type_result; |
7829 | const char *type_name; | |
7830 | enum dwarf_type encoding; | |
7831 | tree name = TYPE_NAME (type); | |
a3f97cbb | 7832 | |
2ad9852d | 7833 | if (TREE_CODE (type) == ERROR_MARK || TREE_CODE (type) == VOID_TYPE) |
a3f97cbb JW |
7834 | return 0; |
7835 | ||
405f63da MM |
7836 | if (name) |
7837 | { | |
7838 | if (TREE_CODE (name) == TYPE_DECL) | |
7839 | name = DECL_NAME (name); | |
7840 | ||
7841 | type_name = IDENTIFIER_POINTER (name); | |
7842 | } | |
7843 | else | |
7844 | type_name = "__unknown__"; | |
a9d38797 | 7845 | |
a3f97cbb JW |
7846 | switch (TREE_CODE (type)) |
7847 | { | |
a3f97cbb | 7848 | case INTEGER_TYPE: |
a9d38797 | 7849 | /* Carefully distinguish the C character types, without messing |
73c68f61 SS |
7850 | up if the language is not C. Note that we check only for the names |
7851 | that contain spaces; other names might occur by coincidence in other | |
7852 | languages. */ | |
a9d38797 JM |
7853 | if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE |
7854 | && (type == char_type_node | |
7855 | || ! strcmp (type_name, "signed char") | |
7856 | || ! strcmp (type_name, "unsigned char")))) | |
a3f97cbb | 7857 | { |
8df83eae | 7858 | if (TYPE_UNSIGNED (type)) |
a9d38797 JM |
7859 | encoding = DW_ATE_unsigned; |
7860 | else | |
7861 | encoding = DW_ATE_signed; | |
7862 | break; | |
a3f97cbb | 7863 | } |
556273e0 | 7864 | /* else fall through. */ |
a3f97cbb | 7865 | |
a9d38797 JM |
7866 | case CHAR_TYPE: |
7867 | /* GNU Pascal/Ada CHAR type. Not used in C. */ | |
8df83eae | 7868 | if (TYPE_UNSIGNED (type)) |
a9d38797 JM |
7869 | encoding = DW_ATE_unsigned_char; |
7870 | else | |
7871 | encoding = DW_ATE_signed_char; | |
a3f97cbb JW |
7872 | break; |
7873 | ||
7874 | case REAL_TYPE: | |
a9d38797 | 7875 | encoding = DW_ATE_float; |
a3f97cbb JW |
7876 | break; |
7877 | ||
405f63da MM |
7878 | /* Dwarf2 doesn't know anything about complex ints, so use |
7879 | a user defined type for it. */ | |
a3f97cbb | 7880 | case COMPLEX_TYPE: |
405f63da MM |
7881 | if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) |
7882 | encoding = DW_ATE_complex_float; | |
7883 | else | |
7884 | encoding = DW_ATE_lo_user; | |
a3f97cbb JW |
7885 | break; |
7886 | ||
7887 | case BOOLEAN_TYPE: | |
a9d38797 JM |
7888 | /* GNU FORTRAN/Ada/C++ BOOLEAN type. */ |
7889 | encoding = DW_ATE_boolean; | |
a3f97cbb JW |
7890 | break; |
7891 | ||
7892 | default: | |
2ad9852d RK |
7893 | /* No other TREE_CODEs are Dwarf fundamental types. */ |
7894 | abort (); | |
a3f97cbb JW |
7895 | } |
7896 | ||
54ba1f0d | 7897 | base_type_result = new_die (DW_TAG_base_type, comp_unit_die, type); |
14a774a9 RK |
7898 | if (demangle_name_func) |
7899 | type_name = (*demangle_name_func) (type_name); | |
7900 | ||
a9d38797 JM |
7901 | add_AT_string (base_type_result, DW_AT_name, type_name); |
7902 | add_AT_unsigned (base_type_result, DW_AT_byte_size, | |
4e5a8d7b | 7903 | int_size_in_bytes (type)); |
a9d38797 | 7904 | add_AT_unsigned (base_type_result, DW_AT_encoding, encoding); |
a3f97cbb JW |
7905 | |
7906 | return base_type_result; | |
7907 | } | |
7908 | ||
7909 | /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to | |
7910 | the Dwarf "root" type for the given input type. The Dwarf "root" type of | |
7911 | a given type is generally the same as the given type, except that if the | |
7912 | given type is a pointer or reference type, then the root type of the given | |
7913 | type is the root type of the "basis" type for the pointer or reference | |
7914 | type. (This definition of the "root" type is recursive.) Also, the root | |
7915 | type of a `const' qualified type or a `volatile' qualified type is the | |
7916 | root type of the given type without the qualifiers. */ | |
71dfc51f | 7917 | |
a3f97cbb | 7918 | static tree |
7080f735 | 7919 | root_type (tree type) |
a3f97cbb JW |
7920 | { |
7921 | if (TREE_CODE (type) == ERROR_MARK) | |
7922 | return error_mark_node; | |
7923 | ||
7924 | switch (TREE_CODE (type)) | |
7925 | { | |
7926 | case ERROR_MARK: | |
7927 | return error_mark_node; | |
7928 | ||
7929 | case POINTER_TYPE: | |
7930 | case REFERENCE_TYPE: | |
7931 | return type_main_variant (root_type (TREE_TYPE (type))); | |
7932 | ||
7933 | default: | |
7934 | return type_main_variant (type); | |
7935 | } | |
7936 | } | |
7937 | ||
cc2902df | 7938 | /* Given a pointer to an arbitrary ..._TYPE tree node, return nonzero if the |
a3f97cbb | 7939 | given input type is a Dwarf "fundamental" type. Otherwise return null. */ |
71dfc51f RK |
7940 | |
7941 | static inline int | |
7080f735 | 7942 | is_base_type (tree type) |
a3f97cbb JW |
7943 | { |
7944 | switch (TREE_CODE (type)) | |
7945 | { | |
7946 | case ERROR_MARK: | |
7947 | case VOID_TYPE: | |
7948 | case INTEGER_TYPE: | |
7949 | case REAL_TYPE: | |
7950 | case COMPLEX_TYPE: | |
7951 | case BOOLEAN_TYPE: | |
7952 | case CHAR_TYPE: | |
7953 | return 1; | |
7954 | ||
7955 | case SET_TYPE: | |
7956 | case ARRAY_TYPE: | |
7957 | case RECORD_TYPE: | |
7958 | case UNION_TYPE: | |
7959 | case QUAL_UNION_TYPE: | |
7960 | case ENUMERAL_TYPE: | |
7961 | case FUNCTION_TYPE: | |
7962 | case METHOD_TYPE: | |
7963 | case POINTER_TYPE: | |
7964 | case REFERENCE_TYPE: | |
7965 | case FILE_TYPE: | |
7966 | case OFFSET_TYPE: | |
7967 | case LANG_TYPE: | |
604bb87d | 7968 | case VECTOR_TYPE: |
a3f97cbb JW |
7969 | return 0; |
7970 | ||
7971 | default: | |
7972 | abort (); | |
7973 | } | |
71dfc51f | 7974 | |
a3f97cbb JW |
7975 | return 0; |
7976 | } | |
7977 | ||
4977bab6 ZW |
7978 | /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE |
7979 | node, return the size in bits for the type if it is a constant, or else | |
7980 | return the alignment for the type if the type's size is not constant, or | |
7981 | else return BITS_PER_WORD if the type actually turns out to be an | |
7982 | ERROR_MARK node. */ | |
7983 | ||
7984 | static inline unsigned HOST_WIDE_INT | |
7080f735 | 7985 | simple_type_size_in_bits (tree type) |
4977bab6 | 7986 | { |
4977bab6 ZW |
7987 | if (TREE_CODE (type) == ERROR_MARK) |
7988 | return BITS_PER_WORD; | |
7989 | else if (TYPE_SIZE (type) == NULL_TREE) | |
7990 | return 0; | |
7991 | else if (host_integerp (TYPE_SIZE (type), 1)) | |
7992 | return tree_low_cst (TYPE_SIZE (type), 1); | |
7993 | else | |
7994 | return TYPE_ALIGN (type); | |
7995 | } | |
7996 | ||
c3cdeef4 JB |
7997 | /* Return true if the debug information for the given type should be |
7998 | emitted as a subrange type. */ | |
7999 | ||
8000 | static inline bool | |
e7d23ce3 B |
8001 | is_subrange_type (tree type) |
8002 | { | |
de99511b B |
8003 | tree subtype = TREE_TYPE (type); |
8004 | ||
886de2d4 JB |
8005 | /* Subrange types are identified by the fact that they are integer |
8006 | types, and that they have a subtype which is either an integer type | |
8007 | or an enumeral type. */ | |
8008 | ||
8009 | if (TREE_CODE (type) != INTEGER_TYPE | |
8010 | || subtype == NULL_TREE) | |
8011 | return false; | |
8012 | ||
8013 | if (TREE_CODE (subtype) != INTEGER_TYPE | |
8014 | && TREE_CODE (subtype) != ENUMERAL_TYPE) | |
8015 | return false; | |
8016 | ||
d6672e91 JB |
8017 | if (TREE_CODE (type) == TREE_CODE (subtype) |
8018 | && int_size_in_bytes (type) == int_size_in_bytes (subtype) | |
8019 | && TYPE_MIN_VALUE (type) != NULL | |
8020 | && TYPE_MIN_VALUE (subtype) != NULL | |
8021 | && tree_int_cst_equal (TYPE_MIN_VALUE (type), TYPE_MIN_VALUE (subtype)) | |
8022 | && TYPE_MAX_VALUE (type) != NULL | |
8023 | && TYPE_MAX_VALUE (subtype) != NULL | |
8024 | && tree_int_cst_equal (TYPE_MAX_VALUE (type), TYPE_MAX_VALUE (subtype))) | |
8025 | { | |
8026 | /* The type and its subtype have the same representation. If in | |
8027 | addition the two types also have the same name, then the given | |
8028 | type is not a subrange type, but rather a plain base type. */ | |
8029 | /* FIXME: brobecker/2004-03-22: | |
8030 | Sizetype INTEGER_CSTs nodes are canonicalized. It should | |
8031 | therefore be sufficient to check the TYPE_SIZE node pointers | |
8032 | rather than checking the actual size. Unfortunately, we have | |
8033 | found some cases, such as in the Ada "integer" type, where | |
8034 | this is not the case. Until this problem is solved, we need to | |
8035 | keep checking the actual size. */ | |
8036 | tree type_name = TYPE_NAME (type); | |
8037 | tree subtype_name = TYPE_NAME (subtype); | |
8038 | ||
8039 | if (type_name != NULL && TREE_CODE (type_name) == TYPE_DECL) | |
8040 | type_name = DECL_NAME (type_name); | |
8041 | ||
8042 | if (subtype_name != NULL && TREE_CODE (subtype_name) == TYPE_DECL) | |
8043 | subtype_name = DECL_NAME (subtype_name); | |
8044 | ||
8045 | if (type_name == subtype_name) | |
8046 | return false; | |
8047 | } | |
8048 | ||
886de2d4 | 8049 | return true; |
c3cdeef4 JB |
8050 | } |
8051 | ||
8052 | /* Given a pointer to a tree node for a subrange type, return a pointer | |
8053 | to a DIE that describes the given type. */ | |
8054 | ||
8055 | static dw_die_ref | |
fbfd77b8 | 8056 | subrange_type_die (tree type, dw_die_ref context_die) |
c3cdeef4 JB |
8057 | { |
8058 | dw_die_ref subtype_die; | |
8059 | dw_die_ref subrange_die; | |
8060 | tree name = TYPE_NAME (type); | |
e7d23ce3 | 8061 | const HOST_WIDE_INT size_in_bytes = int_size_in_bytes (type); |
6582c808 | 8062 | tree subtype = TREE_TYPE (type); |
7080f735 | 8063 | |
fbfd77b8 JB |
8064 | if (context_die == NULL) |
8065 | context_die = comp_unit_die; | |
8066 | ||
6582c808 JB |
8067 | if (TREE_CODE (subtype) == ENUMERAL_TYPE) |
8068 | subtype_die = gen_enumeration_type_die (subtype, context_die); | |
de99511b | 8069 | else |
6582c808 | 8070 | subtype_die = base_type_die (subtype); |
c3cdeef4 | 8071 | |
fbfd77b8 | 8072 | subrange_die = new_die (DW_TAG_subrange_type, context_die, type); |
b98d154e B |
8073 | |
8074 | if (name != NULL) | |
8075 | { | |
8076 | if (TREE_CODE (name) == TYPE_DECL) | |
8077 | name = DECL_NAME (name); | |
8078 | add_name_attribute (subrange_die, IDENTIFIER_POINTER (name)); | |
8079 | } | |
8080 | ||
6582c808 | 8081 | if (int_size_in_bytes (subtype) != size_in_bytes) |
e7d23ce3 B |
8082 | { |
8083 | /* The size of the subrange type and its base type do not match, | |
8084 | so we need to generate a size attribute for the subrange type. */ | |
8085 | add_AT_unsigned (subrange_die, DW_AT_byte_size, size_in_bytes); | |
8086 | } | |
8087 | ||
c3cdeef4 JB |
8088 | if (TYPE_MIN_VALUE (type) != NULL) |
8089 | add_bound_info (subrange_die, DW_AT_lower_bound, | |
8090 | TYPE_MIN_VALUE (type)); | |
8091 | if (TYPE_MAX_VALUE (type) != NULL) | |
8092 | add_bound_info (subrange_die, DW_AT_upper_bound, | |
8093 | TYPE_MAX_VALUE (type)); | |
8094 | add_AT_die_ref (subrange_die, DW_AT_type, subtype_die); | |
8095 | ||
8096 | return subrange_die; | |
8097 | } | |
8098 | ||
a3f97cbb JW |
8099 | /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging |
8100 | entry that chains various modifiers in front of the given type. */ | |
71dfc51f | 8101 | |
a3f97cbb | 8102 | static dw_die_ref |
7080f735 AJ |
8103 | modified_type_die (tree type, int is_const_type, int is_volatile_type, |
8104 | dw_die_ref context_die) | |
a3f97cbb | 8105 | { |
b3694847 SS |
8106 | enum tree_code code = TREE_CODE (type); |
8107 | dw_die_ref mod_type_die = NULL; | |
8108 | dw_die_ref sub_die = NULL; | |
8109 | tree item_type = NULL; | |
a3f97cbb JW |
8110 | |
8111 | if (code != ERROR_MARK) | |
8112 | { | |
5101b304 MM |
8113 | tree qualified_type; |
8114 | ||
8115 | /* See if we already have the appropriately qualified variant of | |
8116 | this type. */ | |
c26fbbca | 8117 | qualified_type |
5101b304 MM |
8118 | = get_qualified_type (type, |
8119 | ((is_const_type ? TYPE_QUAL_CONST : 0) | |
c26fbbca | 8120 | | (is_volatile_type |
5101b304 | 8121 | ? TYPE_QUAL_VOLATILE : 0))); |
2ad9852d | 8122 | |
5101b304 MM |
8123 | /* If we do, then we can just use its DIE, if it exists. */ |
8124 | if (qualified_type) | |
8125 | { | |
8126 | mod_type_die = lookup_type_die (qualified_type); | |
8127 | if (mod_type_die) | |
8128 | return mod_type_die; | |
8129 | } | |
bdb669cb | 8130 | |
556273e0 | 8131 | /* Handle C typedef types. */ |
c26fbbca | 8132 | if (qualified_type && TYPE_NAME (qualified_type) |
5101b304 MM |
8133 | && TREE_CODE (TYPE_NAME (qualified_type)) == TYPE_DECL |
8134 | && DECL_ORIGINAL_TYPE (TYPE_NAME (qualified_type))) | |
a94dbf2c | 8135 | { |
5101b304 MM |
8136 | tree type_name = TYPE_NAME (qualified_type); |
8137 | tree dtype = TREE_TYPE (type_name); | |
2ad9852d | 8138 | |
5101b304 | 8139 | if (qualified_type == dtype) |
a94dbf2c JM |
8140 | { |
8141 | /* For a named type, use the typedef. */ | |
5101b304 MM |
8142 | gen_type_die (qualified_type, context_die); |
8143 | mod_type_die = lookup_type_die (qualified_type); | |
a94dbf2c JM |
8144 | } |
8145 | else if (is_const_type < TYPE_READONLY (dtype) | |
8146 | || is_volatile_type < TYPE_VOLATILE (dtype)) | |
8147 | /* cv-unqualified version of named type. Just use the unnamed | |
8148 | type to which it refers. */ | |
71dfc51f | 8149 | mod_type_die |
5101b304 | 8150 | = modified_type_die (DECL_ORIGINAL_TYPE (type_name), |
71dfc51f RK |
8151 | is_const_type, is_volatile_type, |
8152 | context_die); | |
2ad9852d | 8153 | |
71dfc51f | 8154 | /* Else cv-qualified version of named type; fall through. */ |
a94dbf2c JM |
8155 | } |
8156 | ||
8157 | if (mod_type_die) | |
556273e0 KH |
8158 | /* OK. */ |
8159 | ; | |
a94dbf2c | 8160 | else if (is_const_type) |
a3f97cbb | 8161 | { |
54ba1f0d | 8162 | mod_type_die = new_die (DW_TAG_const_type, comp_unit_die, type); |
a9d38797 | 8163 | sub_die = modified_type_die (type, 0, is_volatile_type, context_die); |
a3f97cbb JW |
8164 | } |
8165 | else if (is_volatile_type) | |
8166 | { | |
54ba1f0d | 8167 | mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die, type); |
a9d38797 | 8168 | sub_die = modified_type_die (type, 0, 0, context_die); |
a3f97cbb JW |
8169 | } |
8170 | else if (code == POINTER_TYPE) | |
8171 | { | |
54ba1f0d | 8172 | mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die, type); |
4977bab6 ZW |
8173 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, |
8174 | simple_type_size_in_bits (type) / BITS_PER_UNIT); | |
61b32c02 | 8175 | #if 0 |
a3f97cbb | 8176 | add_AT_unsigned (mod_type_die, DW_AT_address_class, 0); |
61b32c02 | 8177 | #endif |
a3f97cbb | 8178 | item_type = TREE_TYPE (type); |
a3f97cbb JW |
8179 | } |
8180 | else if (code == REFERENCE_TYPE) | |
8181 | { | |
54ba1f0d | 8182 | mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die, type); |
4977bab6 ZW |
8183 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, |
8184 | simple_type_size_in_bits (type) / BITS_PER_UNIT); | |
61b32c02 | 8185 | #if 0 |
a3f97cbb | 8186 | add_AT_unsigned (mod_type_die, DW_AT_address_class, 0); |
556273e0 | 8187 | #endif |
a3f97cbb | 8188 | item_type = TREE_TYPE (type); |
a3f97cbb | 8189 | } |
e7d23ce3 | 8190 | else if (is_subrange_type (type)) |
fbfd77b8 | 8191 | mod_type_die = subrange_type_die (type, context_die); |
a3f97cbb | 8192 | else if (is_base_type (type)) |
71dfc51f | 8193 | mod_type_die = base_type_die (type); |
a3f97cbb JW |
8194 | else |
8195 | { | |
4b674448 JM |
8196 | gen_type_die (type, context_die); |
8197 | ||
a3f97cbb JW |
8198 | /* We have to get the type_main_variant here (and pass that to the |
8199 | `lookup_type_die' routine) because the ..._TYPE node we have | |
8200 | might simply be a *copy* of some original type node (where the | |
8201 | copy was created to help us keep track of typedef names) and | |
8202 | that copy might have a different TYPE_UID from the original | |
a94dbf2c | 8203 | ..._TYPE node. */ |
0e98f924 AH |
8204 | if (TREE_CODE (type) != VECTOR_TYPE) |
8205 | mod_type_die = lookup_type_die (type_main_variant (type)); | |
8206 | else | |
8207 | /* Vectors have the debugging information in the type, | |
8208 | not the main variant. */ | |
8209 | mod_type_die = lookup_type_die (type); | |
3a88cbd1 JL |
8210 | if (mod_type_die == NULL) |
8211 | abort (); | |
a3f97cbb | 8212 | } |
3d2999ba MK |
8213 | |
8214 | /* We want to equate the qualified type to the die below. */ | |
8370aa3a | 8215 | type = qualified_type; |
a3f97cbb | 8216 | } |
71dfc51f | 8217 | |
8370aa3a RH |
8218 | if (type) |
8219 | equate_type_number_to_die (type, mod_type_die); | |
dfcf9891 | 8220 | if (item_type) |
71dfc51f RK |
8221 | /* We must do this after the equate_type_number_to_die call, in case |
8222 | this is a recursive type. This ensures that the modified_type_die | |
8223 | recursion will terminate even if the type is recursive. Recursive | |
8224 | types are possible in Ada. */ | |
8225 | sub_die = modified_type_die (item_type, | |
8226 | TYPE_READONLY (item_type), | |
8227 | TYPE_VOLATILE (item_type), | |
8228 | context_die); | |
8229 | ||
a3f97cbb | 8230 | if (sub_die != NULL) |
71dfc51f RK |
8231 | add_AT_die_ref (mod_type_die, DW_AT_type, sub_die); |
8232 | ||
a3f97cbb JW |
8233 | return mod_type_die; |
8234 | } | |
8235 | ||
a3f97cbb | 8236 | /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is |
6d2f8887 | 8237 | an enumerated type. */ |
71dfc51f RK |
8238 | |
8239 | static inline int | |
7080f735 | 8240 | type_is_enum (tree type) |
a3f97cbb JW |
8241 | { |
8242 | return TREE_CODE (type) == ENUMERAL_TYPE; | |
8243 | } | |
8244 | ||
23959f19 | 8245 | /* Return the DBX register number described by a given RTL node. */ |
7d9d8943 AM |
8246 | |
8247 | static unsigned int | |
23959f19 | 8248 | dbx_reg_number (rtx rtl) |
7d9d8943 | 8249 | { |
b3694847 | 8250 | unsigned regno = REGNO (rtl); |
7d9d8943 AM |
8251 | |
8252 | if (regno >= FIRST_PSEUDO_REGISTER) | |
e7af1d45 | 8253 | abort (); |
7d9d8943 | 8254 | |
e7af1d45 | 8255 | return DBX_REGISTER_NUMBER (regno); |
7d9d8943 AM |
8256 | } |
8257 | ||
e7af1d45 | 8258 | /* Return a location descriptor that designates a machine register or |
96714395 | 8259 | zero if there is none. */ |
71dfc51f | 8260 | |
a3f97cbb | 8261 | static dw_loc_descr_ref |
7080f735 | 8262 | reg_loc_descriptor (rtx rtl) |
a3f97cbb | 8263 | { |
d22c2324 | 8264 | unsigned reg; |
96714395 | 8265 | rtx regs; |
71dfc51f | 8266 | |
e7af1d45 RK |
8267 | if (REGNO (rtl) >= FIRST_PSEUDO_REGISTER) |
8268 | return 0; | |
8269 | ||
23959f19 | 8270 | reg = dbx_reg_number (rtl); |
5fd9b178 | 8271 | regs = targetm.dwarf_register_span (rtl); |
96714395 | 8272 | |
23959f19 | 8273 | if (hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)] > 1 |
96714395 AH |
8274 | || regs) |
8275 | return multiple_reg_loc_descriptor (rtl, regs); | |
8276 | else | |
8277 | return one_reg_loc_descriptor (reg); | |
8278 | } | |
8279 | ||
8280 | /* Return a location descriptor that designates a machine register for | |
8281 | a given hard register number. */ | |
8282 | ||
8283 | static dw_loc_descr_ref | |
7080f735 | 8284 | one_reg_loc_descriptor (unsigned int regno) |
96714395 AH |
8285 | { |
8286 | if (regno <= 31) | |
8287 | return new_loc_descr (DW_OP_reg0 + regno, 0, 0); | |
d22c2324 | 8288 | else |
96714395 AH |
8289 | return new_loc_descr (DW_OP_regx, regno, 0); |
8290 | } | |
8291 | ||
8292 | /* Given an RTL of a register, return a location descriptor that | |
8293 | designates a value that spans more than one register. */ | |
8294 | ||
8295 | static dw_loc_descr_ref | |
7080f735 | 8296 | multiple_reg_loc_descriptor (rtx rtl, rtx regs) |
96714395 AH |
8297 | { |
8298 | int nregs, size, i; | |
8299 | unsigned reg; | |
8300 | dw_loc_descr_ref loc_result = NULL; | |
71dfc51f | 8301 | |
23959f19 JDA |
8302 | reg = dbx_reg_number (rtl); |
8303 | nregs = hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)]; | |
96714395 AH |
8304 | |
8305 | /* Simple, contiguous registers. */ | |
8306 | if (regs == NULL_RTX) | |
8307 | { | |
8308 | size = GET_MODE_SIZE (GET_MODE (rtl)) / nregs; | |
8309 | ||
8310 | loc_result = NULL; | |
8311 | while (nregs--) | |
8312 | { | |
8313 | dw_loc_descr_ref t; | |
8314 | ||
96714395 AH |
8315 | t = one_reg_loc_descriptor (reg); |
8316 | add_loc_descr (&loc_result, t); | |
8317 | add_loc_descr (&loc_result, new_loc_descr (DW_OP_piece, size, 0)); | |
31ca3635 | 8318 | ++reg; |
96714395 AH |
8319 | } |
8320 | return loc_result; | |
8321 | } | |
8322 | ||
8323 | /* Now onto stupid register sets in non contiguous locations. */ | |
8324 | ||
8325 | if (GET_CODE (regs) != PARALLEL) | |
8326 | abort (); | |
8327 | ||
8328 | size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0))); | |
8329 | loc_result = NULL; | |
8330 | ||
8331 | for (i = 0; i < XVECLEN (regs, 0); ++i) | |
8332 | { | |
8333 | dw_loc_descr_ref t; | |
8334 | ||
8335 | t = one_reg_loc_descriptor (REGNO (XVECEXP (regs, 0, i))); | |
8336 | add_loc_descr (&loc_result, t); | |
8337 | size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0))); | |
8338 | add_loc_descr (&loc_result, new_loc_descr (DW_OP_piece, size, 0)); | |
8339 | } | |
a3f97cbb JW |
8340 | return loc_result; |
8341 | } | |
8342 | ||
d8041cc8 RH |
8343 | /* Return a location descriptor that designates a constant. */ |
8344 | ||
8345 | static dw_loc_descr_ref | |
7080f735 | 8346 | int_loc_descriptor (HOST_WIDE_INT i) |
d8041cc8 RH |
8347 | { |
8348 | enum dwarf_location_atom op; | |
8349 | ||
8350 | /* Pick the smallest representation of a constant, rather than just | |
8351 | defaulting to the LEB encoding. */ | |
8352 | if (i >= 0) | |
8353 | { | |
8354 | if (i <= 31) | |
8355 | op = DW_OP_lit0 + i; | |
8356 | else if (i <= 0xff) | |
8357 | op = DW_OP_const1u; | |
8358 | else if (i <= 0xffff) | |
8359 | op = DW_OP_const2u; | |
8360 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
8361 | || i <= 0xffffffff) | |
8362 | op = DW_OP_const4u; | |
8363 | else | |
8364 | op = DW_OP_constu; | |
8365 | } | |
8366 | else | |
8367 | { | |
8368 | if (i >= -0x80) | |
8369 | op = DW_OP_const1s; | |
8370 | else if (i >= -0x8000) | |
8371 | op = DW_OP_const2s; | |
8372 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
8373 | || i >= -0x80000000) | |
8374 | op = DW_OP_const4s; | |
8375 | else | |
8376 | op = DW_OP_consts; | |
8377 | } | |
8378 | ||
8379 | return new_loc_descr (op, i, 0); | |
8380 | } | |
8381 | ||
a3f97cbb | 8382 | /* Return a location descriptor that designates a base+offset location. */ |
71dfc51f | 8383 | |
a3f97cbb | 8384 | static dw_loc_descr_ref |
0a2d3d69 | 8385 | based_loc_descr (unsigned int reg, HOST_WIDE_INT offset, bool can_use_fbreg) |
a3f97cbb | 8386 | { |
b3694847 | 8387 | dw_loc_descr_ref loc_result; |
810429b7 JM |
8388 | /* For the "frame base", we use the frame pointer or stack pointer |
8389 | registers, since the RTL for local variables is relative to one of | |
8390 | them. */ | |
b3694847 SS |
8391 | unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed |
8392 | ? HARD_FRAME_POINTER_REGNUM | |
8393 | : STACK_POINTER_REGNUM); | |
71dfc51f | 8394 | |
0a2d3d69 | 8395 | if (reg == fp_reg && can_use_fbreg) |
71dfc51f | 8396 | loc_result = new_loc_descr (DW_OP_fbreg, offset, 0); |
85066503 | 8397 | else if (reg <= 31) |
71dfc51f | 8398 | loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0); |
a3f97cbb | 8399 | else |
71dfc51f RK |
8400 | loc_result = new_loc_descr (DW_OP_bregx, reg, offset); |
8401 | ||
a3f97cbb JW |
8402 | return loc_result; |
8403 | } | |
8404 | ||
8405 | /* Return true if this RTL expression describes a base+offset calculation. */ | |
71dfc51f RK |
8406 | |
8407 | static inline int | |
7080f735 | 8408 | is_based_loc (rtx rtl) |
a3f97cbb | 8409 | { |
173bf5be KH |
8410 | return (GET_CODE (rtl) == PLUS |
8411 | && ((GET_CODE (XEXP (rtl, 0)) == REG | |
8412 | && REGNO (XEXP (rtl, 0)) < FIRST_PSEUDO_REGISTER | |
8413 | && GET_CODE (XEXP (rtl, 1)) == CONST_INT))); | |
a3f97cbb JW |
8414 | } |
8415 | ||
8416 | /* The following routine converts the RTL for a variable or parameter | |
8417 | (resident in memory) into an equivalent Dwarf representation of a | |
8418 | mechanism for getting the address of that same variable onto the top of a | |
8419 | hypothetical "address evaluation" stack. | |
71dfc51f | 8420 | |
a3f97cbb JW |
8421 | When creating memory location descriptors, we are effectively transforming |
8422 | the RTL for a memory-resident object into its Dwarf postfix expression | |
8423 | equivalent. This routine recursively descends an RTL tree, turning | |
e60d4d7b JL |
8424 | it into Dwarf postfix code as it goes. |
8425 | ||
8426 | MODE is the mode of the memory reference, needed to handle some | |
e7af1d45 RK |
8427 | autoincrement addressing modes. |
8428 | ||
0a2d3d69 DB |
8429 | CAN_USE_FBREG is a flag whether we can use DW_AT_frame_base in the location |
8430 | list for RTL. We can't use it when we are emitting location list for | |
8431 | virtual variable frame_base_decl (i.e. a location list for DW_AT_frame_base) | |
8432 | which describes how frame base changes when !frame_pointer_needed. | |
8433 | ||
e7af1d45 | 8434 | Return 0 if we can't represent the location. */ |
71dfc51f | 8435 | |
a3f97cbb | 8436 | static dw_loc_descr_ref |
0a2d3d69 | 8437 | mem_loc_descriptor (rtx rtl, enum machine_mode mode, bool can_use_fbreg) |
a3f97cbb JW |
8438 | { |
8439 | dw_loc_descr_ref mem_loc_result = NULL; | |
40f0b3ee | 8440 | enum dwarf_location_atom op; |
e7af1d45 | 8441 | |
556273e0 | 8442 | /* Note that for a dynamically sized array, the location we will generate a |
a3f97cbb JW |
8443 | description of here will be the lowest numbered location which is |
8444 | actually within the array. That's *not* necessarily the same as the | |
8445 | zeroth element of the array. */ | |
71dfc51f | 8446 | |
5fd9b178 | 8447 | rtl = targetm.delegitimize_address (rtl); |
1865dbb5 | 8448 | |
a3f97cbb JW |
8449 | switch (GET_CODE (rtl)) |
8450 | { | |
e60d4d7b JL |
8451 | case POST_INC: |
8452 | case POST_DEC: | |
e2134eea | 8453 | case POST_MODIFY: |
e60d4d7b JL |
8454 | /* POST_INC and POST_DEC can be handled just like a SUBREG. So we |
8455 | just fall into the SUBREG code. */ | |
8456 | ||
2ad9852d | 8457 | /* ... fall through ... */ |
e60d4d7b | 8458 | |
a3f97cbb JW |
8459 | case SUBREG: |
8460 | /* The case of a subreg may arise when we have a local (register) | |
73c68f61 SS |
8461 | variable or a formal (register) parameter which doesn't quite fill |
8462 | up an entire register. For now, just assume that it is | |
8463 | legitimate to make the Dwarf info refer to the whole register which | |
8464 | contains the given subreg. */ | |
ddef6bc7 | 8465 | rtl = SUBREG_REG (rtl); |
71dfc51f | 8466 | |
2ad9852d | 8467 | /* ... fall through ... */ |
a3f97cbb JW |
8468 | |
8469 | case REG: | |
8470 | /* Whenever a register number forms a part of the description of the | |
73c68f61 SS |
8471 | method for calculating the (dynamic) address of a memory resident |
8472 | object, DWARF rules require the register number be referred to as | |
8473 | a "base register". This distinction is not based in any way upon | |
8474 | what category of register the hardware believes the given register | |
8475 | belongs to. This is strictly DWARF terminology we're dealing with | |
8476 | here. Note that in cases where the location of a memory-resident | |
8477 | data object could be expressed as: OP_ADD (OP_BASEREG (basereg), | |
8478 | OP_CONST (0)) the actual DWARF location descriptor that we generate | |
8479 | may just be OP_BASEREG (basereg). This may look deceptively like | |
8480 | the object in question was allocated to a register (rather than in | |
8481 | memory) so DWARF consumers need to be aware of the subtle | |
8482 | distinction between OP_REG and OP_BASEREG. */ | |
e7af1d45 | 8483 | if (REGNO (rtl) < FIRST_PSEUDO_REGISTER) |
23959f19 JDA |
8484 | mem_loc_result = based_loc_descr (dbx_reg_number (rtl), 0, |
8485 | can_use_fbreg); | |
a3f97cbb JW |
8486 | break; |
8487 | ||
8488 | case MEM: | |
0a2d3d69 DB |
8489 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl), |
8490 | can_use_fbreg); | |
e7af1d45 RK |
8491 | if (mem_loc_result != 0) |
8492 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0)); | |
a3f97cbb JW |
8493 | break; |
8494 | ||
1ce324c3 EB |
8495 | case LO_SUM: |
8496 | rtl = XEXP (rtl, 1); | |
8497 | ||
8498 | /* ... fall through ... */ | |
8499 | ||
d8041cc8 RH |
8500 | case LABEL_REF: |
8501 | /* Some ports can transform a symbol ref into a label ref, because | |
7080f735 AJ |
8502 | the symbol ref is too far away and has to be dumped into a constant |
8503 | pool. */ | |
a3f97cbb JW |
8504 | case CONST: |
8505 | case SYMBOL_REF: | |
6331d1c1 | 8506 | /* Alternatively, the symbol in the constant pool might be referenced |
c6f9b9a1 | 8507 | by a different symbol. */ |
2ad9852d | 8508 | if (GET_CODE (rtl) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (rtl)) |
79cdfa4b | 8509 | { |
149d6f9e JJ |
8510 | bool marked; |
8511 | rtx tmp = get_pool_constant_mark (rtl, &marked); | |
2ad9852d | 8512 | |
6331d1c1 | 8513 | if (GET_CODE (tmp) == SYMBOL_REF) |
149d6f9e JJ |
8514 | { |
8515 | rtl = tmp; | |
8516 | if (CONSTANT_POOL_ADDRESS_P (tmp)) | |
8517 | get_pool_constant_mark (tmp, &marked); | |
8518 | else | |
8519 | marked = true; | |
8520 | } | |
8521 | ||
8522 | /* If all references to this pool constant were optimized away, | |
8523 | it was not output and thus we can't represent it. | |
8524 | FIXME: might try to use DW_OP_const_value here, though | |
8525 | DW_OP_piece complicates it. */ | |
8526 | if (!marked) | |
8527 | return 0; | |
79cdfa4b TM |
8528 | } |
8529 | ||
a3f97cbb JW |
8530 | mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0); |
8531 | mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
c470afad RK |
8532 | mem_loc_result->dw_loc_oprnd1.v.val_addr = rtl; |
8533 | VARRAY_PUSH_RTX (used_rtx_varray, rtl); | |
a3f97cbb JW |
8534 | break; |
8535 | ||
e2134eea JH |
8536 | case PRE_MODIFY: |
8537 | /* Extract the PLUS expression nested inside and fall into | |
73c68f61 | 8538 | PLUS code below. */ |
e2134eea JH |
8539 | rtl = XEXP (rtl, 1); |
8540 | goto plus; | |
8541 | ||
e60d4d7b JL |
8542 | case PRE_INC: |
8543 | case PRE_DEC: | |
8544 | /* Turn these into a PLUS expression and fall into the PLUS code | |
8545 | below. */ | |
8546 | rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0), | |
8547 | GEN_INT (GET_CODE (rtl) == PRE_INC | |
556273e0 KH |
8548 | ? GET_MODE_UNIT_SIZE (mode) |
8549 | : -GET_MODE_UNIT_SIZE (mode))); | |
8550 | ||
2ad9852d | 8551 | /* ... fall through ... */ |
e60d4d7b | 8552 | |
a3f97cbb | 8553 | case PLUS: |
e2134eea | 8554 | plus: |
a3f97cbb | 8555 | if (is_based_loc (rtl)) |
23959f19 | 8556 | mem_loc_result = based_loc_descr (dbx_reg_number (XEXP (rtl, 0)), |
0a2d3d69 DB |
8557 | INTVAL (XEXP (rtl, 1)), |
8558 | can_use_fbreg); | |
a3f97cbb JW |
8559 | else |
8560 | { | |
0a2d3d69 DB |
8561 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode, |
8562 | can_use_fbreg); | |
e7af1d45 RK |
8563 | if (mem_loc_result == 0) |
8564 | break; | |
d8041cc8 RH |
8565 | |
8566 | if (GET_CODE (XEXP (rtl, 1)) == CONST_INT | |
8567 | && INTVAL (XEXP (rtl, 1)) >= 0) | |
e7af1d45 RK |
8568 | add_loc_descr (&mem_loc_result, |
8569 | new_loc_descr (DW_OP_plus_uconst, | |
8570 | INTVAL (XEXP (rtl, 1)), 0)); | |
d8041cc8 RH |
8571 | else |
8572 | { | |
8573 | add_loc_descr (&mem_loc_result, | |
0a2d3d69 DB |
8574 | mem_loc_descriptor (XEXP (rtl, 1), mode, |
8575 | can_use_fbreg)); | |
d8041cc8 RH |
8576 | add_loc_descr (&mem_loc_result, |
8577 | new_loc_descr (DW_OP_plus, 0, 0)); | |
8578 | } | |
a3f97cbb JW |
8579 | } |
8580 | break; | |
8581 | ||
40f0b3ee PB |
8582 | /* If a pseudo-reg is optimized away, it is possible for it to |
8583 | be replaced with a MEM containing a multiply or shift. */ | |
dd2478ae | 8584 | case MULT: |
40f0b3ee PB |
8585 | op = DW_OP_mul; |
8586 | goto do_binop; | |
8587 | ||
8588 | case ASHIFT: | |
8589 | op = DW_OP_shl; | |
8590 | goto do_binop; | |
8591 | ||
8592 | case ASHIFTRT: | |
8593 | op = DW_OP_shra; | |
8594 | goto do_binop; | |
8595 | ||
8596 | case LSHIFTRT: | |
8597 | op = DW_OP_shr; | |
8598 | goto do_binop; | |
8599 | ||
8600 | do_binop: | |
e7af1d45 | 8601 | { |
0a2d3d69 DB |
8602 | dw_loc_descr_ref op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, |
8603 | can_use_fbreg); | |
8604 | dw_loc_descr_ref op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, | |
8605 | can_use_fbreg); | |
e7af1d45 RK |
8606 | |
8607 | if (op0 == 0 || op1 == 0) | |
8608 | break; | |
8609 | ||
8610 | mem_loc_result = op0; | |
8611 | add_loc_descr (&mem_loc_result, op1); | |
40f0b3ee | 8612 | add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0)); |
e7af1d45 RK |
8613 | break; |
8614 | } | |
dd2478ae | 8615 | |
a3f97cbb | 8616 | case CONST_INT: |
d8041cc8 | 8617 | mem_loc_result = int_loc_descriptor (INTVAL (rtl)); |
a3f97cbb JW |
8618 | break; |
8619 | ||
a9e8a5ee RK |
8620 | case ADDRESSOF: |
8621 | /* If this is a MEM, return its address. Otherwise, we can't | |
8622 | represent this. */ | |
8623 | if (GET_CODE (XEXP (rtl, 0)) == MEM) | |
0a2d3d69 DB |
8624 | return mem_loc_descriptor (XEXP (XEXP (rtl, 0), 0), mode, |
8625 | can_use_fbreg); | |
a9e8a5ee RK |
8626 | else |
8627 | return 0; | |
8628 | ||
a3f97cbb JW |
8629 | default: |
8630 | abort (); | |
8631 | } | |
71dfc51f | 8632 | |
a3f97cbb JW |
8633 | return mem_loc_result; |
8634 | } | |
8635 | ||
956d6950 | 8636 | /* Return a descriptor that describes the concatenation of two locations. |
4401bf24 JL |
8637 | This is typically a complex variable. */ |
8638 | ||
8639 | static dw_loc_descr_ref | |
7080f735 | 8640 | concat_loc_descriptor (rtx x0, rtx x1) |
4401bf24 JL |
8641 | { |
8642 | dw_loc_descr_ref cc_loc_result = NULL; | |
0a2d3d69 DB |
8643 | dw_loc_descr_ref x0_ref = loc_descriptor (x0, true); |
8644 | dw_loc_descr_ref x1_ref = loc_descriptor (x1, true); | |
4401bf24 | 8645 | |
e7af1d45 RK |
8646 | if (x0_ref == 0 || x1_ref == 0) |
8647 | return 0; | |
8648 | ||
8649 | cc_loc_result = x0_ref; | |
4401bf24 | 8650 | add_loc_descr (&cc_loc_result, |
e7af1d45 RK |
8651 | new_loc_descr (DW_OP_piece, |
8652 | GET_MODE_SIZE (GET_MODE (x0)), 0)); | |
4401bf24 | 8653 | |
e7af1d45 | 8654 | add_loc_descr (&cc_loc_result, x1_ref); |
4401bf24 | 8655 | add_loc_descr (&cc_loc_result, |
e7af1d45 RK |
8656 | new_loc_descr (DW_OP_piece, |
8657 | GET_MODE_SIZE (GET_MODE (x1)), 0)); | |
4401bf24 JL |
8658 | |
8659 | return cc_loc_result; | |
8660 | } | |
8661 | ||
a3f97cbb JW |
8662 | /* Output a proper Dwarf location descriptor for a variable or parameter |
8663 | which is either allocated in a register or in a memory location. For a | |
8664 | register, we just generate an OP_REG and the register number. For a | |
8665 | memory location we provide a Dwarf postfix expression describing how to | |
e7af1d45 RK |
8666 | generate the (dynamic) address of the object onto the address stack. |
8667 | ||
8668 | If we don't know how to describe it, return 0. */ | |
71dfc51f | 8669 | |
a3f97cbb | 8670 | static dw_loc_descr_ref |
0a2d3d69 | 8671 | loc_descriptor (rtx rtl, bool can_use_fbreg) |
a3f97cbb JW |
8672 | { |
8673 | dw_loc_descr_ref loc_result = NULL; | |
e7af1d45 | 8674 | |
a3f97cbb JW |
8675 | switch (GET_CODE (rtl)) |
8676 | { | |
8677 | case SUBREG: | |
a3f97cbb | 8678 | /* The case of a subreg may arise when we have a local (register) |
73c68f61 SS |
8679 | variable or a formal (register) parameter which doesn't quite fill |
8680 | up an entire register. For now, just assume that it is | |
8681 | legitimate to make the Dwarf info refer to the whole register which | |
8682 | contains the given subreg. */ | |
ddef6bc7 | 8683 | rtl = SUBREG_REG (rtl); |
71dfc51f | 8684 | |
2ad9852d | 8685 | /* ... fall through ... */ |
a3f97cbb JW |
8686 | |
8687 | case REG: | |
5c90448c | 8688 | loc_result = reg_loc_descriptor (rtl); |
a3f97cbb JW |
8689 | break; |
8690 | ||
8691 | case MEM: | |
0a2d3d69 DB |
8692 | loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl), |
8693 | can_use_fbreg); | |
a3f97cbb JW |
8694 | break; |
8695 | ||
4401bf24 JL |
8696 | case CONCAT: |
8697 | loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1)); | |
8698 | break; | |
8699 | ||
0a2d3d69 DB |
8700 | case VAR_LOCATION: |
8701 | /* Single part. */ | |
8702 | if (GET_CODE (XEXP (rtl, 1)) != PARALLEL) | |
8703 | { | |
8704 | loc_result = loc_descriptor (XEXP (XEXP (rtl, 1), 0), can_use_fbreg); | |
8705 | } | |
8706 | /* Multiple parts. */ | |
8707 | else | |
8708 | { | |
8709 | rtvec par_elems = XVEC (XEXP (rtl, 1), 0); | |
8710 | int num_elem = GET_NUM_ELEM (par_elems); | |
8711 | enum machine_mode mode; | |
8712 | int i; | |
8713 | ||
8714 | /* Create the first one, so we have something to add to. */ | |
8715 | loc_result = loc_descriptor (XEXP (RTVEC_ELT (par_elems, 0), 0), | |
8716 | can_use_fbreg); | |
8717 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, 0), 0)); | |
8718 | add_loc_descr (&loc_result, | |
8719 | new_loc_descr (DW_OP_piece, GET_MODE_SIZE (mode), 0)); | |
8720 | for (i = 1; i < num_elem; i++) | |
8721 | { | |
8722 | dw_loc_descr_ref temp; | |
8723 | ||
8724 | temp = loc_descriptor (XEXP (RTVEC_ELT (par_elems, i), 0), | |
8725 | can_use_fbreg); | |
8726 | add_loc_descr (&loc_result, temp); | |
8727 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, i), 0)); | |
8728 | add_loc_descr (&loc_result, | |
8729 | new_loc_descr (DW_OP_piece, | |
8730 | GET_MODE_SIZE (mode), 0)); | |
8731 | } | |
8732 | } | |
8733 | break; | |
8734 | ||
a3f97cbb | 8735 | default: |
71dfc51f | 8736 | abort (); |
a3f97cbb | 8737 | } |
71dfc51f | 8738 | |
a3f97cbb JW |
8739 | return loc_result; |
8740 | } | |
8741 | ||
2ad9852d RK |
8742 | /* Similar, but generate the descriptor from trees instead of rtl. This comes |
8743 | up particularly with variable length arrays. If ADDRESSP is nonzero, we are | |
8744 | looking for an address. Otherwise, we return a value. If we can't make a | |
8745 | descriptor, return 0. */ | |
d8041cc8 RH |
8746 | |
8747 | static dw_loc_descr_ref | |
7080f735 | 8748 | loc_descriptor_from_tree (tree loc, int addressp) |
d8041cc8 | 8749 | { |
e7af1d45 RK |
8750 | dw_loc_descr_ref ret, ret1; |
8751 | int indirect_p = 0; | |
8df83eae | 8752 | int unsignedp = TYPE_UNSIGNED (TREE_TYPE (loc)); |
d8041cc8 RH |
8753 | enum dwarf_location_atom op; |
8754 | ||
8755 | /* ??? Most of the time we do not take proper care for sign/zero | |
8756 | extending the values properly. Hopefully this won't be a real | |
8757 | problem... */ | |
8758 | ||
8759 | switch (TREE_CODE (loc)) | |
8760 | { | |
8761 | case ERROR_MARK: | |
e7af1d45 | 8762 | return 0; |
d8041cc8 | 8763 | |
e7af1d45 | 8764 | case PLACEHOLDER_EXPR: |
b4ae5201 RK |
8765 | /* This case involves extracting fields from an object to determine the |
8766 | position of other fields. We don't try to encode this here. The | |
8767 | only user of this is Ada, which encodes the needed information using | |
8768 | the names of types. */ | |
e7af1d45 | 8769 | return 0; |
b4ae5201 | 8770 | |
aea9695c RK |
8771 | case CALL_EXPR: |
8772 | return 0; | |
8773 | ||
4ada538b MM |
8774 | case PREINCREMENT_EXPR: |
8775 | case PREDECREMENT_EXPR: | |
8776 | case POSTINCREMENT_EXPR: | |
8777 | case POSTDECREMENT_EXPR: | |
8778 | /* There are no opcodes for these operations. */ | |
8779 | return 0; | |
8780 | ||
aea9695c RK |
8781 | case ADDR_EXPR: |
8782 | /* We can support this only if we can look through conversions and | |
8783 | find an INDIRECT_EXPR. */ | |
8784 | for (loc = TREE_OPERAND (loc, 0); | |
8785 | TREE_CODE (loc) == CONVERT_EXPR || TREE_CODE (loc) == NOP_EXPR | |
8786 | || TREE_CODE (loc) == NON_LVALUE_EXPR | |
8787 | || TREE_CODE (loc) == VIEW_CONVERT_EXPR | |
8788 | || TREE_CODE (loc) == SAVE_EXPR; | |
8789 | loc = TREE_OPERAND (loc, 0)) | |
8790 | ; | |
8791 | ||
8792 | return (TREE_CODE (loc) == INDIRECT_REF | |
8793 | ? loc_descriptor_from_tree (TREE_OPERAND (loc, 0), addressp) | |
8794 | : 0); | |
8795 | ||
d8041cc8 | 8796 | case VAR_DECL: |
b9203463 RH |
8797 | if (DECL_THREAD_LOCAL (loc)) |
8798 | { | |
8799 | rtx rtl; | |
8800 | ||
8801 | #ifndef ASM_OUTPUT_DWARF_DTPREL | |
8802 | /* If this is not defined, we have no way to emit the data. */ | |
8803 | return 0; | |
8804 | #endif | |
8805 | ||
8806 | /* The way DW_OP_GNU_push_tls_address is specified, we can only | |
8807 | look up addresses of objects in the current module. */ | |
3c655f42 | 8808 | if (DECL_EXTERNAL (loc)) |
b9203463 RH |
8809 | return 0; |
8810 | ||
8811 | rtl = rtl_for_decl_location (loc); | |
8812 | if (rtl == NULL_RTX) | |
8813 | return 0; | |
8814 | ||
8815 | if (GET_CODE (rtl) != MEM) | |
8816 | return 0; | |
8817 | rtl = XEXP (rtl, 0); | |
8818 | if (! CONSTANT_P (rtl)) | |
8819 | return 0; | |
8820 | ||
8821 | ret = new_loc_descr (INTERNAL_DW_OP_tls_addr, 0, 0); | |
8822 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
8823 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
8824 | ||
8825 | ret1 = new_loc_descr (DW_OP_GNU_push_tls_address, 0, 0); | |
8826 | add_loc_descr (&ret, ret1); | |
8827 | ||
8828 | indirect_p = 1; | |
8829 | break; | |
8830 | } | |
5d3cc252 | 8831 | /* Fall through. */ |
b9203463 | 8832 | |
d8041cc8 | 8833 | case PARM_DECL: |
6de9cd9a | 8834 | case RESULT_DECL: |
d8041cc8 RH |
8835 | { |
8836 | rtx rtl = rtl_for_decl_location (loc); | |
d8041cc8 | 8837 | |
a97c9600 | 8838 | if (rtl == NULL_RTX) |
e7af1d45 | 8839 | return 0; |
a97c9600 | 8840 | else if (CONSTANT_P (rtl)) |
d8041cc8 RH |
8841 | { |
8842 | ret = new_loc_descr (DW_OP_addr, 0, 0); | |
8843 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
8844 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
e7af1d45 | 8845 | indirect_p = 1; |
d8041cc8 RH |
8846 | } |
8847 | else | |
8848 | { | |
c28abdf0 RH |
8849 | enum machine_mode mode = GET_MODE (rtl); |
8850 | ||
d8041cc8 RH |
8851 | if (GET_CODE (rtl) == MEM) |
8852 | { | |
e7af1d45 | 8853 | indirect_p = 1; |
d8041cc8 RH |
8854 | rtl = XEXP (rtl, 0); |
8855 | } | |
2ad9852d | 8856 | |
0a2d3d69 | 8857 | ret = mem_loc_descriptor (rtl, mode, true); |
d8041cc8 RH |
8858 | } |
8859 | } | |
8860 | break; | |
8861 | ||
8862 | case INDIRECT_REF: | |
8863 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
e7af1d45 | 8864 | indirect_p = 1; |
d8041cc8 RH |
8865 | break; |
8866 | ||
749552c4 RK |
8867 | case COMPOUND_EXPR: |
8868 | return loc_descriptor_from_tree (TREE_OPERAND (loc, 1), addressp); | |
8869 | ||
ed972b14 RK |
8870 | case NOP_EXPR: |
8871 | case CONVERT_EXPR: | |
8872 | case NON_LVALUE_EXPR: | |
ed239f5a | 8873 | case VIEW_CONVERT_EXPR: |
b4ae5201 | 8874 | case SAVE_EXPR: |
032cb602 | 8875 | case MODIFY_EXPR: |
ed972b14 | 8876 | return loc_descriptor_from_tree (TREE_OPERAND (loc, 0), addressp); |
e57cabac | 8877 | |
d8041cc8 RH |
8878 | case COMPONENT_REF: |
8879 | case BIT_FIELD_REF: | |
8880 | case ARRAY_REF: | |
b4e3fabb | 8881 | case ARRAY_RANGE_REF: |
d8041cc8 RH |
8882 | { |
8883 | tree obj, offset; | |
8884 | HOST_WIDE_INT bitsize, bitpos, bytepos; | |
8885 | enum machine_mode mode; | |
8886 | int volatilep; | |
d8041cc8 RH |
8887 | |
8888 | obj = get_inner_reference (loc, &bitsize, &bitpos, &offset, &mode, | |
a06ef755 | 8889 | &unsignedp, &volatilep); |
e7af1d45 RK |
8890 | |
8891 | if (obj == loc) | |
8892 | return 0; | |
8893 | ||
d8041cc8 | 8894 | ret = loc_descriptor_from_tree (obj, 1); |
e7af1d45 | 8895 | if (ret == 0 |
2ad9852d | 8896 | || bitpos % BITS_PER_UNIT != 0 || bitsize % BITS_PER_UNIT != 0) |
e7af1d45 | 8897 | return 0; |
d8041cc8 RH |
8898 | |
8899 | if (offset != NULL_TREE) | |
8900 | { | |
8901 | /* Variable offset. */ | |
8902 | add_loc_descr (&ret, loc_descriptor_from_tree (offset, 0)); | |
8903 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); | |
8904 | } | |
8905 | ||
e7af1d45 RK |
8906 | if (!addressp) |
8907 | indirect_p = 1; | |
d8041cc8 RH |
8908 | |
8909 | bytepos = bitpos / BITS_PER_UNIT; | |
8910 | if (bytepos > 0) | |
8911 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus_uconst, bytepos, 0)); | |
8912 | else if (bytepos < 0) | |
8913 | { | |
8914 | add_loc_descr (&ret, int_loc_descriptor (bytepos)); | |
8915 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); | |
8916 | } | |
8917 | break; | |
8918 | } | |
8919 | ||
8920 | case INTEGER_CST: | |
8921 | if (host_integerp (loc, 0)) | |
8922 | ret = int_loc_descriptor (tree_low_cst (loc, 0)); | |
e7af1d45 RK |
8923 | else |
8924 | return 0; | |
d8041cc8 | 8925 | break; |
d8041cc8 | 8926 | |
c67b2a58 RK |
8927 | case CONSTRUCTOR: |
8928 | { | |
75c20980 RH |
8929 | /* Get an RTL for this, if something has been emitted. */ |
8930 | rtx rtl = lookup_constant_def (loc); | |
8931 | enum machine_mode mode; | |
8932 | ||
8933 | if (GET_CODE (rtl) != MEM) | |
8934 | return 0; | |
8935 | mode = GET_MODE (rtl); | |
8936 | rtl = XEXP (rtl, 0); | |
8937 | ||
5fd9b178 | 8938 | rtl = targetm.delegitimize_address (rtl); |
75c20980 | 8939 | |
c67b2a58 | 8940 | indirect_p = 1; |
0a2d3d69 | 8941 | ret = mem_loc_descriptor (rtl, mode, true); |
c67b2a58 RK |
8942 | break; |
8943 | } | |
8944 | ||
c26fbbca | 8945 | case TRUTH_AND_EXPR: |
9702143f | 8946 | case TRUTH_ANDIF_EXPR: |
d8041cc8 RH |
8947 | case BIT_AND_EXPR: |
8948 | op = DW_OP_and; | |
8949 | goto do_binop; | |
e7af1d45 | 8950 | |
9702143f | 8951 | case TRUTH_XOR_EXPR: |
d8041cc8 RH |
8952 | case BIT_XOR_EXPR: |
8953 | op = DW_OP_xor; | |
8954 | goto do_binop; | |
e7af1d45 | 8955 | |
9702143f RK |
8956 | case TRUTH_OR_EXPR: |
8957 | case TRUTH_ORIF_EXPR: | |
d8041cc8 RH |
8958 | case BIT_IOR_EXPR: |
8959 | op = DW_OP_or; | |
8960 | goto do_binop; | |
e7af1d45 | 8961 | |
8dcea3f3 VC |
8962 | case FLOOR_DIV_EXPR: |
8963 | case CEIL_DIV_EXPR: | |
8964 | case ROUND_DIV_EXPR: | |
d8041cc8 RH |
8965 | case TRUNC_DIV_EXPR: |
8966 | op = DW_OP_div; | |
8967 | goto do_binop; | |
e7af1d45 | 8968 | |
d8041cc8 RH |
8969 | case MINUS_EXPR: |
8970 | op = DW_OP_minus; | |
8971 | goto do_binop; | |
e7af1d45 | 8972 | |
8dcea3f3 VC |
8973 | case FLOOR_MOD_EXPR: |
8974 | case CEIL_MOD_EXPR: | |
8975 | case ROUND_MOD_EXPR: | |
d8041cc8 RH |
8976 | case TRUNC_MOD_EXPR: |
8977 | op = DW_OP_mod; | |
8978 | goto do_binop; | |
e7af1d45 | 8979 | |
d8041cc8 RH |
8980 | case MULT_EXPR: |
8981 | op = DW_OP_mul; | |
8982 | goto do_binop; | |
e7af1d45 | 8983 | |
d8041cc8 RH |
8984 | case LSHIFT_EXPR: |
8985 | op = DW_OP_shl; | |
8986 | goto do_binop; | |
e7af1d45 | 8987 | |
d8041cc8 RH |
8988 | case RSHIFT_EXPR: |
8989 | op = (unsignedp ? DW_OP_shr : DW_OP_shra); | |
8990 | goto do_binop; | |
e7af1d45 | 8991 | |
d8041cc8 RH |
8992 | case PLUS_EXPR: |
8993 | if (TREE_CODE (TREE_OPERAND (loc, 1)) == INTEGER_CST | |
8994 | && host_integerp (TREE_OPERAND (loc, 1), 0)) | |
8995 | { | |
8996 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
e7af1d45 RK |
8997 | if (ret == 0) |
8998 | return 0; | |
8999 | ||
d8041cc8 RH |
9000 | add_loc_descr (&ret, |
9001 | new_loc_descr (DW_OP_plus_uconst, | |
9002 | tree_low_cst (TREE_OPERAND (loc, 1), | |
9003 | 0), | |
9004 | 0)); | |
9005 | break; | |
9006 | } | |
e7af1d45 | 9007 | |
d8041cc8 RH |
9008 | op = DW_OP_plus; |
9009 | goto do_binop; | |
2ad9852d | 9010 | |
d8041cc8 | 9011 | case LE_EXPR: |
8df83eae | 9012 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9013 | return 0; |
9014 | ||
d8041cc8 RH |
9015 | op = DW_OP_le; |
9016 | goto do_binop; | |
e7af1d45 | 9017 | |
d8041cc8 | 9018 | case GE_EXPR: |
8df83eae | 9019 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9020 | return 0; |
9021 | ||
d8041cc8 RH |
9022 | op = DW_OP_ge; |
9023 | goto do_binop; | |
e7af1d45 | 9024 | |
d8041cc8 | 9025 | case LT_EXPR: |
8df83eae | 9026 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9027 | return 0; |
9028 | ||
d8041cc8 RH |
9029 | op = DW_OP_lt; |
9030 | goto do_binop; | |
e7af1d45 | 9031 | |
d8041cc8 | 9032 | case GT_EXPR: |
8df83eae | 9033 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9034 | return 0; |
9035 | ||
d8041cc8 RH |
9036 | op = DW_OP_gt; |
9037 | goto do_binop; | |
e7af1d45 | 9038 | |
d8041cc8 RH |
9039 | case EQ_EXPR: |
9040 | op = DW_OP_eq; | |
9041 | goto do_binop; | |
e7af1d45 | 9042 | |
d8041cc8 RH |
9043 | case NE_EXPR: |
9044 | op = DW_OP_ne; | |
9045 | goto do_binop; | |
9046 | ||
9047 | do_binop: | |
9048 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
e7af1d45 RK |
9049 | ret1 = loc_descriptor_from_tree (TREE_OPERAND (loc, 1), 0); |
9050 | if (ret == 0 || ret1 == 0) | |
9051 | return 0; | |
9052 | ||
9053 | add_loc_descr (&ret, ret1); | |
d8041cc8 RH |
9054 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); |
9055 | break; | |
9056 | ||
9702143f | 9057 | case TRUTH_NOT_EXPR: |
d8041cc8 RH |
9058 | case BIT_NOT_EXPR: |
9059 | op = DW_OP_not; | |
9060 | goto do_unop; | |
e7af1d45 | 9061 | |
d8041cc8 RH |
9062 | case ABS_EXPR: |
9063 | op = DW_OP_abs; | |
9064 | goto do_unop; | |
e7af1d45 | 9065 | |
d8041cc8 RH |
9066 | case NEGATE_EXPR: |
9067 | op = DW_OP_neg; | |
9068 | goto do_unop; | |
9069 | ||
9070 | do_unop: | |
9071 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
e7af1d45 RK |
9072 | if (ret == 0) |
9073 | return 0; | |
9074 | ||
d8041cc8 RH |
9075 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); |
9076 | break; | |
9077 | ||
fd5580cb | 9078 | case MIN_EXPR: |
d8041cc8 | 9079 | case MAX_EXPR: |
fd5580cb B |
9080 | { |
9081 | const enum tree_code code = | |
9082 | TREE_CODE (loc) == MIN_EXPR ? GT_EXPR : LT_EXPR; | |
9083 | ||
9084 | loc = build (COND_EXPR, TREE_TYPE (loc), | |
9085 | build (code, integer_type_node, | |
9086 | TREE_OPERAND (loc, 0), TREE_OPERAND (loc, 1)), | |
9087 | TREE_OPERAND (loc, 1), TREE_OPERAND (loc, 0)); | |
9088 | } | |
2ad9852d | 9089 | |
3ef42a0c | 9090 | /* ... fall through ... */ |
d8041cc8 RH |
9091 | |
9092 | case COND_EXPR: | |
9093 | { | |
e7af1d45 RK |
9094 | dw_loc_descr_ref lhs |
9095 | = loc_descriptor_from_tree (TREE_OPERAND (loc, 1), 0); | |
9096 | dw_loc_descr_ref rhs | |
9097 | = loc_descriptor_from_tree (TREE_OPERAND (loc, 2), 0); | |
d8041cc8 RH |
9098 | dw_loc_descr_ref bra_node, jump_node, tmp; |
9099 | ||
9100 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
e7af1d45 RK |
9101 | if (ret == 0 || lhs == 0 || rhs == 0) |
9102 | return 0; | |
9103 | ||
d8041cc8 RH |
9104 | bra_node = new_loc_descr (DW_OP_bra, 0, 0); |
9105 | add_loc_descr (&ret, bra_node); | |
9106 | ||
e7af1d45 | 9107 | add_loc_descr (&ret, rhs); |
d8041cc8 RH |
9108 | jump_node = new_loc_descr (DW_OP_skip, 0, 0); |
9109 | add_loc_descr (&ret, jump_node); | |
9110 | ||
e7af1d45 | 9111 | add_loc_descr (&ret, lhs); |
d8041cc8 | 9112 | bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc; |
e7af1d45 | 9113 | bra_node->dw_loc_oprnd1.v.val_loc = lhs; |
d8041cc8 RH |
9114 | |
9115 | /* ??? Need a node to point the skip at. Use a nop. */ | |
9116 | tmp = new_loc_descr (DW_OP_nop, 0, 0); | |
9117 | add_loc_descr (&ret, tmp); | |
9118 | jump_node->dw_loc_oprnd1.val_class = dw_val_class_loc; | |
9119 | jump_node->dw_loc_oprnd1.v.val_loc = tmp; | |
9120 | } | |
9121 | break; | |
9122 | ||
9123 | default: | |
7d445f15 RH |
9124 | /* Leave front-end specific codes as simply unknown. This comes |
9125 | up, for instance, with the C STMT_EXPR. */ | |
9126 | if ((unsigned int) TREE_CODE (loc) | |
9127 | >= (unsigned int) LAST_AND_UNUSED_TREE_CODE) | |
9128 | return 0; | |
9129 | ||
9130 | /* Otherwise this is a generic code; we should just lists all of | |
9131 | these explicitly. Aborting means we forgot one. */ | |
d8041cc8 RH |
9132 | abort (); |
9133 | } | |
9134 | ||
e7af1d45 RK |
9135 | /* Show if we can't fill the request for an address. */ |
9136 | if (addressp && indirect_p == 0) | |
9137 | return 0; | |
d8041cc8 RH |
9138 | |
9139 | /* If we've got an address and don't want one, dereference. */ | |
e7af1d45 | 9140 | if (!addressp && indirect_p > 0) |
d8041cc8 | 9141 | { |
e7af1d45 RK |
9142 | HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (loc)); |
9143 | ||
9144 | if (size > DWARF2_ADDR_SIZE || size == -1) | |
9145 | return 0; | |
2ad9852d | 9146 | else if (size == DWARF2_ADDR_SIZE) |
d8041cc8 RH |
9147 | op = DW_OP_deref; |
9148 | else | |
9149 | op = DW_OP_deref_size; | |
e7af1d45 RK |
9150 | |
9151 | add_loc_descr (&ret, new_loc_descr (op, size, 0)); | |
d8041cc8 RH |
9152 | } |
9153 | ||
9154 | return ret; | |
9155 | } | |
9156 | ||
665f2503 | 9157 | /* Given a value, round it up to the lowest multiple of `boundary' |
a3f97cbb | 9158 | which is not less than the value itself. */ |
71dfc51f | 9159 | |
665f2503 | 9160 | static inline HOST_WIDE_INT |
7080f735 | 9161 | ceiling (HOST_WIDE_INT value, unsigned int boundary) |
a3f97cbb JW |
9162 | { |
9163 | return (((value + boundary - 1) / boundary) * boundary); | |
9164 | } | |
9165 | ||
9166 | /* Given a pointer to what is assumed to be a FIELD_DECL node, return a | |
9167 | pointer to the declared type for the relevant field variable, or return | |
9168 | `integer_type_node' if the given node turns out to be an | |
9169 | ERROR_MARK node. */ | |
71dfc51f RK |
9170 | |
9171 | static inline tree | |
7080f735 | 9172 | field_type (tree decl) |
a3f97cbb | 9173 | { |
b3694847 | 9174 | tree type; |
a3f97cbb JW |
9175 | |
9176 | if (TREE_CODE (decl) == ERROR_MARK) | |
9177 | return integer_type_node; | |
9178 | ||
9179 | type = DECL_BIT_FIELD_TYPE (decl); | |
71dfc51f | 9180 | if (type == NULL_TREE) |
a3f97cbb JW |
9181 | type = TREE_TYPE (decl); |
9182 | ||
9183 | return type; | |
9184 | } | |
9185 | ||
5f446d21 DD |
9186 | /* Given a pointer to a tree node, return the alignment in bits for |
9187 | it, or else return BITS_PER_WORD if the node actually turns out to | |
9188 | be an ERROR_MARK node. */ | |
71dfc51f RK |
9189 | |
9190 | static inline unsigned | |
7080f735 | 9191 | simple_type_align_in_bits (tree type) |
a3f97cbb JW |
9192 | { |
9193 | return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD; | |
9194 | } | |
9195 | ||
5f446d21 | 9196 | static inline unsigned |
7080f735 | 9197 | simple_decl_align_in_bits (tree decl) |
5f446d21 DD |
9198 | { |
9199 | return (TREE_CODE (decl) != ERROR_MARK) ? DECL_ALIGN (decl) : BITS_PER_WORD; | |
9200 | } | |
9201 | ||
2ad9852d RK |
9202 | /* Given a pointer to a FIELD_DECL, compute and return the byte offset of the |
9203 | lowest addressed byte of the "containing object" for the given FIELD_DECL, | |
9204 | or return 0 if we are unable to determine what that offset is, either | |
9205 | because the argument turns out to be a pointer to an ERROR_MARK node, or | |
9206 | because the offset is actually variable. (We can't handle the latter case | |
9207 | just yet). */ | |
71dfc51f | 9208 | |
665f2503 | 9209 | static HOST_WIDE_INT |
7080f735 | 9210 | field_byte_offset (tree decl) |
a3f97cbb | 9211 | { |
665f2503 | 9212 | unsigned int type_align_in_bits; |
5f446d21 | 9213 | unsigned int decl_align_in_bits; |
665f2503 | 9214 | unsigned HOST_WIDE_INT type_size_in_bits; |
665f2503 | 9215 | HOST_WIDE_INT object_offset_in_bits; |
665f2503 RK |
9216 | tree type; |
9217 | tree field_size_tree; | |
9218 | HOST_WIDE_INT bitpos_int; | |
9219 | HOST_WIDE_INT deepest_bitpos; | |
9220 | unsigned HOST_WIDE_INT field_size_in_bits; | |
a3f97cbb JW |
9221 | |
9222 | if (TREE_CODE (decl) == ERROR_MARK) | |
9223 | return 0; | |
2ad9852d | 9224 | else if (TREE_CODE (decl) != FIELD_DECL) |
a3f97cbb JW |
9225 | abort (); |
9226 | ||
9227 | type = field_type (decl); | |
a3f97cbb JW |
9228 | field_size_tree = DECL_SIZE (decl); |
9229 | ||
3df18884 RH |
9230 | /* The size could be unspecified if there was an error, or for |
9231 | a flexible array member. */ | |
50352c9c | 9232 | if (! field_size_tree) |
3df18884 | 9233 | field_size_tree = bitsize_zero_node; |
50352c9c | 9234 | |
556273e0 | 9235 | /* We cannot yet cope with fields whose positions are variable, so |
a3f97cbb JW |
9236 | for now, when we see such things, we simply return 0. Someday, we may |
9237 | be able to handle such cases, but it will be damn difficult. */ | |
665f2503 | 9238 | if (! host_integerp (bit_position (decl), 0)) |
a3f97cbb | 9239 | return 0; |
14a774a9 | 9240 | |
665f2503 | 9241 | bitpos_int = int_bit_position (decl); |
a3f97cbb | 9242 | |
3df18884 | 9243 | /* If we don't know the size of the field, pretend it's a full word. */ |
665f2503 RK |
9244 | if (host_integerp (field_size_tree, 1)) |
9245 | field_size_in_bits = tree_low_cst (field_size_tree, 1); | |
14a774a9 RK |
9246 | else |
9247 | field_size_in_bits = BITS_PER_WORD; | |
a3f97cbb JW |
9248 | |
9249 | type_size_in_bits = simple_type_size_in_bits (type); | |
a3f97cbb | 9250 | type_align_in_bits = simple_type_align_in_bits (type); |
5f446d21 | 9251 | decl_align_in_bits = simple_decl_align_in_bits (decl); |
a3f97cbb | 9252 | |
2ad9852d RK |
9253 | /* The GCC front-end doesn't make any attempt to keep track of the starting |
9254 | bit offset (relative to the start of the containing structure type) of the | |
9255 | hypothetical "containing object" for a bit-field. Thus, when computing | |
9256 | the byte offset value for the start of the "containing object" of a | |
9257 | bit-field, we must deduce this information on our own. This can be rather | |
9258 | tricky to do in some cases. For example, handling the following structure | |
9259 | type definition when compiling for an i386/i486 target (which only aligns | |
9260 | long long's to 32-bit boundaries) can be very tricky: | |
a3f97cbb JW |
9261 | |
9262 | struct S { int field1; long long field2:31; }; | |
9263 | ||
2ad9852d RK |
9264 | Fortunately, there is a simple rule-of-thumb which can be used in such |
9265 | cases. When compiling for an i386/i486, GCC will allocate 8 bytes for the | |
9266 | structure shown above. It decides to do this based upon one simple rule | |
9267 | for bit-field allocation. GCC allocates each "containing object" for each | |
9268 | bit-field at the first (i.e. lowest addressed) legitimate alignment | |
9269 | boundary (based upon the required minimum alignment for the declared type | |
9270 | of the field) which it can possibly use, subject to the condition that | |
9271 | there is still enough available space remaining in the containing object | |
9272 | (when allocated at the selected point) to fully accommodate all of the | |
9273 | bits of the bit-field itself. | |
9274 | ||
9275 | This simple rule makes it obvious why GCC allocates 8 bytes for each | |
9276 | object of the structure type shown above. When looking for a place to | |
9277 | allocate the "containing object" for `field2', the compiler simply tries | |
9278 | to allocate a 64-bit "containing object" at each successive 32-bit | |
9279 | boundary (starting at zero) until it finds a place to allocate that 64- | |
9280 | bit field such that at least 31 contiguous (and previously unallocated) | |
9281 | bits remain within that selected 64 bit field. (As it turns out, for the | |
9282 | example above, the compiler finds it is OK to allocate the "containing | |
9283 | object" 64-bit field at bit-offset zero within the structure type.) | |
9284 | ||
9285 | Here we attempt to work backwards from the limited set of facts we're | |
9286 | given, and we try to deduce from those facts, where GCC must have believed | |
9287 | that the containing object started (within the structure type). The value | |
9288 | we deduce is then used (by the callers of this routine) to generate | |
9289 | DW_AT_location and DW_AT_bit_offset attributes for fields (both bit-fields | |
9290 | and, in the case of DW_AT_location, regular fields as well). */ | |
a3f97cbb JW |
9291 | |
9292 | /* Figure out the bit-distance from the start of the structure to the | |
9293 | "deepest" bit of the bit-field. */ | |
9294 | deepest_bitpos = bitpos_int + field_size_in_bits; | |
9295 | ||
9296 | /* This is the tricky part. Use some fancy footwork to deduce where the | |
9297 | lowest addressed bit of the containing object must be. */ | |
5f446d21 DD |
9298 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; |
9299 | ||
9300 | /* Round up to type_align by default. This works best for bitfields. */ | |
9301 | object_offset_in_bits += type_align_in_bits - 1; | |
9302 | object_offset_in_bits /= type_align_in_bits; | |
9303 | object_offset_in_bits *= type_align_in_bits; | |
a3f97cbb | 9304 | |
5f446d21 DD |
9305 | if (object_offset_in_bits > bitpos_int) |
9306 | { | |
9307 | /* Sigh, the decl must be packed. */ | |
9308 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; | |
9309 | ||
9310 | /* Round up to decl_align instead. */ | |
9311 | object_offset_in_bits += decl_align_in_bits - 1; | |
9312 | object_offset_in_bits /= decl_align_in_bits; | |
9313 | object_offset_in_bits *= decl_align_in_bits; | |
9314 | } | |
a3f97cbb | 9315 | |
2ad9852d | 9316 | return object_offset_in_bits / BITS_PER_UNIT; |
a3f97cbb | 9317 | } |
a3f97cbb | 9318 | \f |
71dfc51f RK |
9319 | /* The following routines define various Dwarf attributes and any data |
9320 | associated with them. */ | |
a3f97cbb | 9321 | |
ef76d03b | 9322 | /* Add a location description attribute value to a DIE. |
a3f97cbb | 9323 | |
ef76d03b | 9324 | This emits location attributes suitable for whole variables and |
a3f97cbb JW |
9325 | whole parameters. Note that the location attributes for struct fields are |
9326 | generated by the routine `data_member_location_attribute' below. */ | |
71dfc51f | 9327 | |
b9203463 | 9328 | static inline void |
7080f735 AJ |
9329 | add_AT_location_description (dw_die_ref die, enum dwarf_attribute attr_kind, |
9330 | dw_loc_descr_ref descr) | |
a3f97cbb | 9331 | { |
e7af1d45 RK |
9332 | if (descr != 0) |
9333 | add_AT_loc (die, attr_kind, descr); | |
a3f97cbb JW |
9334 | } |
9335 | ||
2ad9852d RK |
9336 | /* Attach the specialized form of location attribute used for data members of |
9337 | struct and union types. In the special case of a FIELD_DECL node which | |
9338 | represents a bit-field, the "offset" part of this special location | |
9339 | descriptor must indicate the distance in bytes from the lowest-addressed | |
9340 | byte of the containing struct or union type to the lowest-addressed byte of | |
9341 | the "containing object" for the bit-field. (See the `field_byte_offset' | |
9342 | function above). | |
9343 | ||
9344 | For any given bit-field, the "containing object" is a hypothetical object | |
9345 | (of some integral or enum type) within which the given bit-field lives. The | |
9346 | type of this hypothetical "containing object" is always the same as the | |
9347 | declared type of the individual bit-field itself (for GCC anyway... the | |
9348 | DWARF spec doesn't actually mandate this). Note that it is the size (in | |
9349 | bytes) of the hypothetical "containing object" which will be given in the | |
9350 | DW_AT_byte_size attribute for this bit-field. (See the | |
9351 | `byte_size_attribute' function below.) It is also used when calculating the | |
9352 | value of the DW_AT_bit_offset attribute. (See the `bit_offset_attribute' | |
9353 | function below.) */ | |
71dfc51f | 9354 | |
a3f97cbb | 9355 | static void |
7080f735 | 9356 | add_data_member_location_attribute (dw_die_ref die, tree decl) |
a3f97cbb | 9357 | { |
799f628a | 9358 | HOST_WIDE_INT offset; |
649ce3f2 | 9359 | dw_loc_descr_ref loc_descr = 0; |
a3f97cbb | 9360 | |
61b32c02 | 9361 | if (TREE_CODE (decl) == TREE_VEC) |
649ce3f2 JM |
9362 | { |
9363 | /* We're working on the TAG_inheritance for a base class. */ | |
1d3d6b1e | 9364 | if (TREE_VIA_VIRTUAL (decl) && is_cxx ()) |
649ce3f2 JM |
9365 | { |
9366 | /* For C++ virtual bases we can't just use BINFO_OFFSET, as they | |
9367 | aren't at a fixed offset from all (sub)objects of the same | |
9368 | type. We need to extract the appropriate offset from our | |
9369 | vtable. The following dwarf expression means | |
9370 | ||
9371 | BaseAddr = ObAddr + *((*ObAddr) - Offset) | |
9372 | ||
9373 | This is specific to the V3 ABI, of course. */ | |
9374 | ||
9375 | dw_loc_descr_ref tmp; | |
2ad9852d | 9376 | |
649ce3f2 JM |
9377 | /* Make a copy of the object address. */ |
9378 | tmp = new_loc_descr (DW_OP_dup, 0, 0); | |
9379 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 9380 | |
649ce3f2 JM |
9381 | /* Extract the vtable address. */ |
9382 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
9383 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 9384 | |
649ce3f2 JM |
9385 | /* Calculate the address of the offset. */ |
9386 | offset = tree_low_cst (BINFO_VPTR_FIELD (decl), 0); | |
9387 | if (offset >= 0) | |
9388 | abort (); | |
2ad9852d | 9389 | |
649ce3f2 JM |
9390 | tmp = int_loc_descriptor (-offset); |
9391 | add_loc_descr (&loc_descr, tmp); | |
9392 | tmp = new_loc_descr (DW_OP_minus, 0, 0); | |
9393 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 9394 | |
649ce3f2 JM |
9395 | /* Extract the offset. */ |
9396 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
9397 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 9398 | |
649ce3f2 JM |
9399 | /* Add it to the object address. */ |
9400 | tmp = new_loc_descr (DW_OP_plus, 0, 0); | |
9401 | add_loc_descr (&loc_descr, tmp); | |
9402 | } | |
9403 | else | |
9404 | offset = tree_low_cst (BINFO_OFFSET (decl), 0); | |
9405 | } | |
61b32c02 JM |
9406 | else |
9407 | offset = field_byte_offset (decl); | |
9408 | ||
649ce3f2 JM |
9409 | if (! loc_descr) |
9410 | { | |
9411 | enum dwarf_location_atom op; | |
9412 | ||
2ad9852d RK |
9413 | /* The DWARF2 standard says that we should assume that the structure |
9414 | address is already on the stack, so we can specify a structure field | |
9415 | address by using DW_OP_plus_uconst. */ | |
71dfc51f | 9416 | |
a3f97cbb | 9417 | #ifdef MIPS_DEBUGGING_INFO |
2ad9852d RK |
9418 | /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst |
9419 | operator correctly. It works only if we leave the offset on the | |
9420 | stack. */ | |
649ce3f2 | 9421 | op = DW_OP_constu; |
a3f97cbb | 9422 | #else |
649ce3f2 | 9423 | op = DW_OP_plus_uconst; |
a3f97cbb | 9424 | #endif |
71dfc51f | 9425 | |
649ce3f2 JM |
9426 | loc_descr = new_loc_descr (op, offset, 0); |
9427 | } | |
2ad9852d | 9428 | |
a3f97cbb JW |
9429 | add_AT_loc (die, DW_AT_data_member_location, loc_descr); |
9430 | } | |
9431 | ||
e7ee3914 AM |
9432 | /* Writes integer values to dw_vec_const array. */ |
9433 | ||
9434 | static void | |
9435 | insert_int (HOST_WIDE_INT val, unsigned int size, unsigned char *dest) | |
9436 | { | |
9437 | while (size != 0) | |
9438 | { | |
9439 | *dest++ = val & 0xff; | |
9440 | val >>= 8; | |
9441 | --size; | |
9442 | } | |
9443 | } | |
9444 | ||
9445 | /* Reads integers from dw_vec_const array. Inverse of insert_int. */ | |
9446 | ||
9447 | static HOST_WIDE_INT | |
9448 | extract_int (const unsigned char *src, unsigned int size) | |
9449 | { | |
9450 | HOST_WIDE_INT val = 0; | |
9451 | ||
9452 | src += size; | |
9453 | while (size != 0) | |
9454 | { | |
9455 | val <<= 8; | |
9456 | val |= *--src & 0xff; | |
9457 | --size; | |
9458 | } | |
9459 | return val; | |
9460 | } | |
9461 | ||
9462 | /* Writes floating point values to dw_vec_const array. */ | |
9463 | ||
9464 | static void | |
9465 | insert_float (rtx rtl, unsigned char *array) | |
9466 | { | |
9467 | REAL_VALUE_TYPE rv; | |
9468 | long val[4]; | |
9469 | int i; | |
9470 | ||
9471 | REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl); | |
9472 | real_to_target (val, &rv, GET_MODE (rtl)); | |
9473 | ||
9474 | /* real_to_target puts 32-bit pieces in each long. Pack them. */ | |
9475 | for (i = 0; i < GET_MODE_SIZE (GET_MODE (rtl)) / 4; i++) | |
9476 | { | |
9477 | insert_int (val[i], 4, array); | |
9478 | array += 4; | |
9479 | } | |
9480 | } | |
9481 | ||
b20b352b | 9482 | /* Attach a DW_AT_const_value attribute for a variable or a parameter which |
a3f97cbb JW |
9483 | does not have a "location" either in memory or in a register. These |
9484 | things can arise in GNU C when a constant is passed as an actual parameter | |
9485 | to an inlined function. They can also arise in C++ where declared | |
9486 | constants do not necessarily get memory "homes". */ | |
71dfc51f | 9487 | |
a3f97cbb | 9488 | static void |
7080f735 | 9489 | add_const_value_attribute (dw_die_ref die, rtx rtl) |
a3f97cbb JW |
9490 | { |
9491 | switch (GET_CODE (rtl)) | |
9492 | { | |
9493 | case CONST_INT: | |
2e4b9b8c RH |
9494 | { |
9495 | HOST_WIDE_INT val = INTVAL (rtl); | |
c26fbbca | 9496 | |
799f628a JH |
9497 | if (val < 0) |
9498 | add_AT_int (die, DW_AT_const_value, val); | |
9499 | else | |
9500 | add_AT_unsigned (die, DW_AT_const_value, (unsigned HOST_WIDE_INT) val); | |
2e4b9b8c | 9501 | } |
a3f97cbb JW |
9502 | break; |
9503 | ||
9504 | case CONST_DOUBLE: | |
9505 | /* Note that a CONST_DOUBLE rtx could represent either an integer or a | |
73c68f61 SS |
9506 | floating-point constant. A CONST_DOUBLE is used whenever the |
9507 | constant requires more than one word in order to be adequately | |
9508 | represented. We output CONST_DOUBLEs as blocks. */ | |
469ac993 | 9509 | { |
b3694847 | 9510 | enum machine_mode mode = GET_MODE (rtl); |
469ac993 JM |
9511 | |
9512 | if (GET_MODE_CLASS (mode) == MODE_FLOAT) | |
9513 | { | |
e7ee3914 AM |
9514 | unsigned int length = GET_MODE_SIZE (mode); |
9515 | unsigned char *array = ggc_alloc (length); | |
469ac993 | 9516 | |
e7ee3914 AM |
9517 | insert_float (rtl, array); |
9518 | add_AT_vec (die, DW_AT_const_value, length / 4, 4, array); | |
469ac993 JM |
9519 | } |
9520 | else | |
2e4b9b8c RH |
9521 | { |
9522 | /* ??? We really should be using HOST_WIDE_INT throughout. */ | |
9523 | if (HOST_BITS_PER_LONG != HOST_BITS_PER_WIDE_INT) | |
9524 | abort (); | |
2ad9852d | 9525 | |
2e4b9b8c RH |
9526 | add_AT_long_long (die, DW_AT_const_value, |
9527 | CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl)); | |
9528 | } | |
469ac993 | 9529 | } |
a3f97cbb JW |
9530 | break; |
9531 | ||
e7ee3914 AM |
9532 | case CONST_VECTOR: |
9533 | { | |
9534 | enum machine_mode mode = GET_MODE (rtl); | |
9535 | unsigned int elt_size = GET_MODE_UNIT_SIZE (mode); | |
9536 | unsigned int length = CONST_VECTOR_NUNITS (rtl); | |
9537 | unsigned char *array = ggc_alloc (length * elt_size); | |
9538 | unsigned int i; | |
9539 | unsigned char *p; | |
9540 | ||
9541 | if (GET_MODE_CLASS (mode) == MODE_VECTOR_INT) | |
9542 | { | |
9543 | for (i = 0, p = array; i < length; i++, p += elt_size) | |
9544 | { | |
9545 | rtx elt = CONST_VECTOR_ELT (rtl, i); | |
9546 | HOST_WIDE_INT lo, hi; | |
9547 | if (GET_CODE (elt) == CONST_INT) | |
9548 | { | |
9549 | lo = INTVAL (elt); | |
9550 | hi = -(lo < 0); | |
9551 | } | |
9552 | else if (GET_CODE (elt) == CONST_DOUBLE) | |
9553 | { | |
9554 | lo = CONST_DOUBLE_LOW (elt); | |
9555 | hi = CONST_DOUBLE_HIGH (elt); | |
9556 | } | |
9557 | else | |
9558 | abort (); | |
9559 | ||
9560 | if (elt_size <= sizeof (HOST_WIDE_INT)) | |
9561 | insert_int (lo, elt_size, p); | |
9562 | else if (elt_size == 2 * sizeof (HOST_WIDE_INT)) | |
9563 | { | |
9564 | unsigned char *p0 = p; | |
9565 | unsigned char *p1 = p + sizeof (HOST_WIDE_INT); | |
9566 | ||
9567 | if (WORDS_BIG_ENDIAN) | |
9568 | { | |
9569 | p0 = p1; | |
9570 | p1 = p; | |
9571 | } | |
9572 | insert_int (lo, sizeof (HOST_WIDE_INT), p0); | |
9573 | insert_int (hi, sizeof (HOST_WIDE_INT), p1); | |
9574 | } | |
9575 | else | |
9576 | abort (); | |
9577 | } | |
9578 | } | |
9579 | else if (GET_MODE_CLASS (mode) == MODE_VECTOR_FLOAT) | |
9580 | { | |
9581 | for (i = 0, p = array; i < length; i++, p += elt_size) | |
9582 | { | |
9583 | rtx elt = CONST_VECTOR_ELT (rtl, i); | |
9584 | insert_float (elt, p); | |
9585 | } | |
9586 | } | |
9587 | else | |
9588 | abort (); | |
9589 | ||
9590 | add_AT_vec (die, DW_AT_const_value, length, elt_size, array); | |
9591 | } | |
9592 | break; | |
9593 | ||
a3f97cbb JW |
9594 | case CONST_STRING: |
9595 | add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0)); | |
9596 | break; | |
9597 | ||
9598 | case SYMBOL_REF: | |
9599 | case LABEL_REF: | |
9600 | case CONST: | |
c470afad RK |
9601 | add_AT_addr (die, DW_AT_const_value, rtl); |
9602 | VARRAY_PUSH_RTX (used_rtx_varray, rtl); | |
a3f97cbb JW |
9603 | break; |
9604 | ||
9605 | case PLUS: | |
9606 | /* In cases where an inlined instance of an inline function is passed | |
73c68f61 SS |
9607 | the address of an `auto' variable (which is local to the caller) we |
9608 | can get a situation where the DECL_RTL of the artificial local | |
9609 | variable (for the inlining) which acts as a stand-in for the | |
9610 | corresponding formal parameter (of the inline function) will look | |
9611 | like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not | |
9612 | exactly a compile-time constant expression, but it isn't the address | |
9613 | of the (artificial) local variable either. Rather, it represents the | |
9614 | *value* which the artificial local variable always has during its | |
9615 | lifetime. We currently have no way to represent such quasi-constant | |
9616 | values in Dwarf, so for now we just punt and generate nothing. */ | |
a3f97cbb JW |
9617 | break; |
9618 | ||
9619 | default: | |
9620 | /* No other kinds of rtx should be possible here. */ | |
9621 | abort (); | |
9622 | } | |
9623 | ||
9624 | } | |
9625 | ||
d8041cc8 | 9626 | static rtx |
7080f735 | 9627 | rtl_for_decl_location (tree decl) |
a3f97cbb | 9628 | { |
b3694847 | 9629 | rtx rtl; |
71dfc51f | 9630 | |
a3f97cbb JW |
9631 | /* Here we have to decide where we are going to say the parameter "lives" |
9632 | (as far as the debugger is concerned). We only have a couple of | |
9633 | choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL. | |
71dfc51f | 9634 | |
556273e0 | 9635 | DECL_RTL normally indicates where the parameter lives during most of the |
71dfc51f | 9636 | activation of the function. If optimization is enabled however, this |
556273e0 | 9637 | could be either NULL or else a pseudo-reg. Both of those cases indicate |
a3f97cbb JW |
9638 | that the parameter doesn't really live anywhere (as far as the code |
9639 | generation parts of GCC are concerned) during most of the function's | |
9640 | activation. That will happen (for example) if the parameter is never | |
71dfc51f RK |
9641 | referenced within the function. |
9642 | ||
9643 | We could just generate a location descriptor here for all non-NULL | |
9644 | non-pseudo values of DECL_RTL and ignore all of the rest, but we can be | |
9645 | a little nicer than that if we also consider DECL_INCOMING_RTL in cases | |
9646 | where DECL_RTL is NULL or is a pseudo-reg. | |
9647 | ||
9648 | Note however that we can only get away with using DECL_INCOMING_RTL as | |
9649 | a backup substitute for DECL_RTL in certain limited cases. In cases | |
9650 | where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl), | |
9651 | we can be sure that the parameter was passed using the same type as it is | |
9652 | declared to have within the function, and that its DECL_INCOMING_RTL | |
9653 | points us to a place where a value of that type is passed. | |
9654 | ||
9655 | In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different, | |
9656 | we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL | |
9657 | because in these cases DECL_INCOMING_RTL points us to a value of some | |
9658 | type which is *different* from the type of the parameter itself. Thus, | |
9659 | if we tried to use DECL_INCOMING_RTL to generate a location attribute in | |
9660 | such cases, the debugger would end up (for example) trying to fetch a | |
9661 | `float' from a place which actually contains the first part of a | |
9662 | `double'. That would lead to really incorrect and confusing | |
9663 | output at debug-time. | |
9664 | ||
9665 | So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL | |
9666 | in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There | |
9667 | are a couple of exceptions however. On little-endian machines we can | |
9668 | get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is | |
9669 | not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is | |
9670 | an integral type that is smaller than TREE_TYPE (decl). These cases arise | |
9671 | when (on a little-endian machine) a non-prototyped function has a | |
9672 | parameter declared to be of type `short' or `char'. In such cases, | |
9673 | TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will | |
9674 | be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the | |
9675 | passed `int' value. If the debugger then uses that address to fetch | |
9676 | a `short' or a `char' (on a little-endian machine) the result will be | |
9677 | the correct data, so we allow for such exceptional cases below. | |
9678 | ||
9679 | Note that our goal here is to describe the place where the given formal | |
2ad9852d RK |
9680 | parameter lives during most of the function's activation (i.e. between the |
9681 | end of the prologue and the start of the epilogue). We'll do that as best | |
9682 | as we can. Note however that if the given formal parameter is modified | |
9683 | sometime during the execution of the function, then a stack backtrace (at | |
9684 | debug-time) will show the function as having been called with the *new* | |
9685 | value rather than the value which was originally passed in. This happens | |
9686 | rarely enough that it is not a major problem, but it *is* a problem, and | |
9687 | I'd like to fix it. | |
9688 | ||
9689 | A future version of dwarf2out.c may generate two additional attributes for | |
9690 | any given DW_TAG_formal_parameter DIE which will describe the "passed | |
9691 | type" and the "passed location" for the given formal parameter in addition | |
9692 | to the attributes we now generate to indicate the "declared type" and the | |
9693 | "active location" for each parameter. This additional set of attributes | |
9694 | could be used by debuggers for stack backtraces. Separately, note that | |
9695 | sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be NULL also. | |
9696 | This happens (for example) for inlined-instances of inline function formal | |
9697 | parameters which are never referenced. This really shouldn't be | |
9698 | happening. All PARM_DECL nodes should get valid non-NULL | |
6de9cd9a | 9699 | DECL_INCOMING_RTL values. FIXME. */ |
a3f97cbb JW |
9700 | |
9701 | /* Use DECL_RTL as the "location" unless we find something better. */ | |
110c3568 | 9702 | rtl = DECL_RTL_IF_SET (decl); |
a3f97cbb | 9703 | |
c28abdf0 | 9704 | /* When generating abstract instances, ignore everything except |
234c071b KB |
9705 | constants, symbols living in memory, and symbols living in |
9706 | fixed registers. */ | |
c28abdf0 RH |
9707 | if (! reload_completed) |
9708 | { | |
9709 | if (rtl | |
9710 | && (CONSTANT_P (rtl) | |
9711 | || (GET_CODE (rtl) == MEM | |
234c071b KB |
9712 | && CONSTANT_P (XEXP (rtl, 0))) |
9713 | || (GET_CODE (rtl) == REG | |
9714 | && TREE_CODE (decl) == VAR_DECL | |
9715 | && TREE_STATIC (decl)))) | |
4c8c0dec | 9716 | { |
5fd9b178 | 9717 | rtl = targetm.delegitimize_address (rtl); |
4c8c0dec JJ |
9718 | return rtl; |
9719 | } | |
c28abdf0 RH |
9720 | rtl = NULL_RTX; |
9721 | } | |
9722 | else if (TREE_CODE (decl) == PARM_DECL) | |
a3f97cbb JW |
9723 | { |
9724 | if (rtl == NULL_RTX || is_pseudo_reg (rtl)) | |
9725 | { | |
d8041cc8 RH |
9726 | tree declared_type = type_main_variant (TREE_TYPE (decl)); |
9727 | tree passed_type = type_main_variant (DECL_ARG_TYPE (decl)); | |
a3f97cbb | 9728 | |
71dfc51f | 9729 | /* This decl represents a formal parameter which was optimized out. |
a3f97cbb | 9730 | Note that DECL_INCOMING_RTL may be NULL in here, but we handle |
2ad9852d | 9731 | all cases where (rtl == NULL_RTX) just below. */ |
a3f97cbb | 9732 | if (declared_type == passed_type) |
71dfc51f RK |
9733 | rtl = DECL_INCOMING_RTL (decl); |
9734 | else if (! BYTES_BIG_ENDIAN | |
9735 | && TREE_CODE (declared_type) == INTEGER_TYPE | |
555b6442 HPN |
9736 | && (GET_MODE_SIZE (TYPE_MODE (declared_type)) |
9737 | <= GET_MODE_SIZE (TYPE_MODE (passed_type)))) | |
556273e0 | 9738 | rtl = DECL_INCOMING_RTL (decl); |
a3f97cbb | 9739 | } |
5a904a61 JW |
9740 | |
9741 | /* If the parm was passed in registers, but lives on the stack, then | |
9742 | make a big endian correction if the mode of the type of the | |
9743 | parameter is not the same as the mode of the rtl. */ | |
9744 | /* ??? This is the same series of checks that are made in dbxout.c before | |
9745 | we reach the big endian correction code there. It isn't clear if all | |
9746 | of these checks are necessary here, but keeping them all is the safe | |
9747 | thing to do. */ | |
9748 | else if (GET_CODE (rtl) == MEM | |
9749 | && XEXP (rtl, 0) != const0_rtx | |
9750 | && ! CONSTANT_P (XEXP (rtl, 0)) | |
9751 | /* Not passed in memory. */ | |
9752 | && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM | |
9753 | /* Not passed by invisible reference. */ | |
9754 | && (GET_CODE (XEXP (rtl, 0)) != REG | |
9755 | || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM | |
9756 | || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM | |
9757 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
9758 | || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM | |
9759 | #endif | |
9760 | ) | |
9761 | /* Big endian correction check. */ | |
9762 | && BYTES_BIG_ENDIAN | |
9763 | && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl) | |
9764 | && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))) | |
9765 | < UNITS_PER_WORD)) | |
9766 | { | |
9767 | int offset = (UNITS_PER_WORD | |
9768 | - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))); | |
2ad9852d | 9769 | |
5a904a61 JW |
9770 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), |
9771 | plus_constant (XEXP (rtl, 0), offset)); | |
9772 | } | |
a3f97cbb | 9773 | } |
8b495402 | 9774 | else if (TREE_CODE (decl) == VAR_DECL |
de3c6d93 | 9775 | && rtl |
8b495402 DD |
9776 | && GET_CODE (rtl) == MEM |
9777 | && GET_MODE (rtl) != TYPE_MODE (TREE_TYPE (decl)) | |
9778 | && BYTES_BIG_ENDIAN) | |
9779 | { | |
9780 | int rsize = GET_MODE_SIZE (GET_MODE (rtl)); | |
9781 | int dsize = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))); | |
9782 | ||
9783 | /* If a variable is declared "register" yet is smaller than | |
9784 | a register, then if we store the variable to memory, it | |
9785 | looks like we're storing a register-sized value, when in | |
9786 | fact we are not. We need to adjust the offset of the | |
9787 | storage location to reflect the actual value's bytes, | |
9788 | else gdb will not be able to display it. */ | |
9789 | if (rsize > dsize) | |
9790 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), | |
9791 | plus_constant (XEXP (rtl, 0), rsize-dsize)); | |
9792 | } | |
71dfc51f | 9793 | |
d8041cc8 RH |
9794 | if (rtl != NULL_RTX) |
9795 | { | |
9796 | rtl = eliminate_regs (rtl, 0, NULL_RTX); | |
6a7a9f01 | 9797 | #ifdef LEAF_REG_REMAP |
d8041cc8 RH |
9798 | if (current_function_uses_only_leaf_regs) |
9799 | leaf_renumber_regs_insn (rtl); | |
6a7a9f01 | 9800 | #endif |
d8041cc8 RH |
9801 | } |
9802 | ||
2ad9852d RK |
9803 | /* A variable with no DECL_RTL but a DECL_INITIAL is a compile-time constant, |
9804 | and will have been substituted directly into all expressions that use it. | |
9805 | C does not have such a concept, but C++ and other languages do. */ | |
c28abdf0 | 9806 | else if (TREE_CODE (decl) == VAR_DECL && DECL_INITIAL (decl)) |
6d73371a JJ |
9807 | { |
9808 | /* If a variable is initialized with a string constant without embedded | |
9809 | zeros, build CONST_STRING. */ | |
9810 | if (TREE_CODE (DECL_INITIAL (decl)) == STRING_CST | |
9811 | && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
9812 | { | |
9813 | tree arrtype = TREE_TYPE (decl); | |
9814 | tree enttype = TREE_TYPE (arrtype); | |
9815 | tree domain = TYPE_DOMAIN (arrtype); | |
9816 | tree init = DECL_INITIAL (decl); | |
9817 | enum machine_mode mode = TYPE_MODE (enttype); | |
9818 | ||
9819 | if (GET_MODE_CLASS (mode) == MODE_INT && GET_MODE_SIZE (mode) == 1 | |
9820 | && domain | |
9821 | && integer_zerop (TYPE_MIN_VALUE (domain)) | |
9822 | && compare_tree_int (TYPE_MAX_VALUE (domain), | |
9823 | TREE_STRING_LENGTH (init) - 1) == 0 | |
9824 | && ((size_t) TREE_STRING_LENGTH (init) | |
9825 | == strlen (TREE_STRING_POINTER (init)) + 1)) | |
839ee4bc | 9826 | rtl = gen_rtx_CONST_STRING (VOIDmode, TREE_STRING_POINTER (init)); |
6d73371a | 9827 | } |
29b91443 JM |
9828 | /* If the initializer is something that we know will expand into an |
9829 | immediate RTL constant, expand it now. Expanding anything else | |
9830 | tends to produce unresolved symbols; see debug/5770 and c++/6381. */ | |
9831 | else if (TREE_CODE (DECL_INITIAL (decl)) == INTEGER_CST | |
9832 | || TREE_CODE (DECL_INITIAL (decl)) == REAL_CST) | |
6d73371a JJ |
9833 | { |
9834 | rtl = expand_expr (DECL_INITIAL (decl), NULL_RTX, VOIDmode, | |
9835 | EXPAND_INITIALIZER); | |
29b91443 | 9836 | /* If expand_expr returns a MEM, it wasn't immediate. */ |
6d73371a | 9837 | if (rtl && GET_CODE (rtl) == MEM) |
29b91443 | 9838 | abort (); |
6d73371a JJ |
9839 | } |
9840 | } | |
8063ddcf | 9841 | |
4c8c0dec | 9842 | if (rtl) |
5fd9b178 | 9843 | rtl = targetm.delegitimize_address (rtl); |
b9203463 RH |
9844 | |
9845 | /* If we don't look past the constant pool, we risk emitting a | |
9846 | reference to a constant pool entry that isn't referenced from | |
9847 | code, and thus is not emitted. */ | |
9848 | if (rtl) | |
9849 | rtl = avoid_constant_pool_reference (rtl); | |
9850 | ||
d8041cc8 RH |
9851 | return rtl; |
9852 | } | |
9853 | ||
b20b352b | 9854 | /* Generate *either* a DW_AT_location attribute or else a DW_AT_const_value |
d8041cc8 RH |
9855 | data attribute for a variable or a parameter. We generate the |
9856 | DW_AT_const_value attribute only in those cases where the given variable | |
9857 | or parameter does not have a true "location" either in memory or in a | |
9858 | register. This can happen (for example) when a constant is passed as an | |
9859 | actual argument in a call to an inline function. (It's possible that | |
9860 | these things can crop up in other ways also.) Note that one type of | |
9861 | constant value which can be passed into an inlined function is a constant | |
9862 | pointer. This can happen for example if an actual argument in an inlined | |
9863 | function call evaluates to a compile-time constant address. */ | |
9864 | ||
9865 | static void | |
0a2d3d69 DB |
9866 | add_location_or_const_value_attribute (dw_die_ref die, tree decl, |
9867 | enum dwarf_attribute attr) | |
d8041cc8 | 9868 | { |
b3694847 | 9869 | rtx rtl; |
b9203463 | 9870 | dw_loc_descr_ref descr; |
0a2d3d69 | 9871 | var_loc_list *loc_list; |
d8041cc8 RH |
9872 | |
9873 | if (TREE_CODE (decl) == ERROR_MARK) | |
9874 | return; | |
6de9cd9a DN |
9875 | else if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL |
9876 | && TREE_CODE (decl) != RESULT_DECL) | |
d8041cc8 RH |
9877 | abort (); |
9878 | ||
0a2d3d69 DB |
9879 | /* See if we possibly have multiple locations for this variable. */ |
9880 | loc_list = lookup_decl_loc (decl); | |
9881 | ||
9882 | /* If it truly has multiple locations, the first and last node will | |
9883 | differ. */ | |
9884 | if (loc_list && loc_list->first != loc_list->last) | |
9885 | { | |
9886 | const char *secname; | |
9887 | const char *endname; | |
9888 | dw_loc_list_ref list; | |
9889 | rtx varloc; | |
9890 | struct var_loc_node *node; | |
9891 | ||
9892 | /* We need to figure out what section we should use as the base | |
9893 | for the address ranges where a given location is valid. | |
9894 | 1. If this particular DECL has a section associated with it, | |
9895 | use that. | |
9896 | 2. If this function has a section associated with it, use | |
9897 | that. | |
9898 | 3. Otherwise, use the text section. | |
9899 | XXX: If you split a variable across multiple sections, this | |
9900 | won't notice. */ | |
9901 | ||
9902 | if (DECL_SECTION_NAME (decl)) | |
9903 | { | |
9904 | tree sectree = DECL_SECTION_NAME (decl); | |
9905 | secname = TREE_STRING_POINTER (sectree); | |
9906 | } | |
9907 | else if (current_function_decl | |
9908 | && DECL_SECTION_NAME (current_function_decl)) | |
9909 | { | |
9910 | tree sectree = DECL_SECTION_NAME (current_function_decl); | |
9911 | secname = TREE_STRING_POINTER (sectree); | |
9912 | } | |
9913 | else | |
e193b408 | 9914 | secname = text_section_label; |
0a2d3d69 DB |
9915 | |
9916 | /* Now that we know what section we are using for a base, | |
9917 | actually construct the list of locations. | |
9918 | The first location information is what is passed to the | |
9919 | function that creates the location list, and the remaining | |
9920 | locations just get added on to that list. | |
9921 | Note that we only know the start address for a location | |
9922 | (IE location changes), so to build the range, we use | |
9923 | the range [current location start, next location start]. | |
9924 | This means we have to special case the last node, and generate | |
9925 | a range of [last location start, end of function label]. */ | |
9926 | ||
9927 | node = loc_list->first; | |
9928 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
9929 | list = new_loc_list (loc_descriptor (varloc, attr != DW_AT_frame_base), | |
9930 | node->label, node->next->label, secname, 1); | |
9931 | node = node->next; | |
9932 | ||
9933 | for (; node->next; node = node->next) | |
9934 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note) != NULL_RTX) | |
9935 | { | |
9936 | /* The variable has a location between NODE->LABEL and | |
9937 | NODE->NEXT->LABEL. */ | |
9938 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
9939 | add_loc_descr_to_loc_list (&list, | |
9940 | loc_descriptor (varloc, | |
9941 | attr != DW_AT_frame_base), | |
9942 | node->label, node->next->label, secname); | |
9943 | } | |
9944 | ||
9945 | /* If the variable has a location at the last label | |
9946 | it keeps its location until the end of function. */ | |
9947 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note) != NULL_RTX) | |
9948 | { | |
9949 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
9950 | ||
9951 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
9952 | if (!current_function_decl) | |
9953 | endname = text_end_label; | |
9954 | else | |
9955 | { | |
9956 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, | |
9957 | current_function_funcdef_no); | |
9958 | endname = ggc_strdup (label_id); | |
9959 | } | |
9960 | add_loc_descr_to_loc_list (&list, | |
9961 | loc_descriptor (varloc, | |
9962 | attr != DW_AT_frame_base), | |
9963 | node->label, endname, secname); | |
9964 | } | |
9965 | ||
9966 | /* Finally, add the location list to the DIE, and we are done. */ | |
9967 | add_AT_loc_list (die, attr, list); | |
9968 | return; | |
9969 | } | |
9970 | ||
d8041cc8 | 9971 | rtl = rtl_for_decl_location (decl); |
a97c9600 RH |
9972 | if (rtl == NULL_RTX) |
9973 | return; | |
6a7a9f01 | 9974 | |
a3f97cbb JW |
9975 | switch (GET_CODE (rtl)) |
9976 | { | |
e9a25f70 | 9977 | case ADDRESSOF: |
b9203463 RH |
9978 | /* The address of a variable that was optimized away; |
9979 | don't emit anything. */ | |
e9a25f70 JL |
9980 | break; |
9981 | ||
a3f97cbb JW |
9982 | case CONST_INT: |
9983 | case CONST_DOUBLE: | |
e7ee3914 | 9984 | case CONST_VECTOR: |
a3f97cbb JW |
9985 | case CONST_STRING: |
9986 | case SYMBOL_REF: | |
9987 | case LABEL_REF: | |
9988 | case CONST: | |
9989 | case PLUS: | |
9990 | /* DECL_RTL could be (plus (reg ...) (const_int ...)) */ | |
9991 | add_const_value_attribute (die, rtl); | |
9992 | break; | |
9993 | ||
9994 | case MEM: | |
b9203463 RH |
9995 | if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl)) |
9996 | { | |
9997 | /* Need loc_descriptor_from_tree since that's where we know | |
9998 | how to handle TLS variables. Want the object's address | |
9999 | since the top-level DW_AT_location assumes such. See | |
10000 | the confusion in loc_descriptor for reference. */ | |
10001 | descr = loc_descriptor_from_tree (decl, 1); | |
10002 | } | |
10003 | else | |
10004 | { | |
10005 | case REG: | |
10006 | case SUBREG: | |
10007 | case CONCAT: | |
0a2d3d69 | 10008 | descr = loc_descriptor (rtl, true); |
b9203463 | 10009 | } |
0a2d3d69 | 10010 | add_AT_location_description (die, attr, descr); |
a3f97cbb | 10011 | break; |
7080f735 | 10012 | |
d44c7e36 DB |
10013 | case PARALLEL: |
10014 | { | |
10015 | rtvec par_elems = XVEC (rtl, 0); | |
10016 | int num_elem = GET_NUM_ELEM (par_elems); | |
10017 | enum machine_mode mode; | |
10018 | int i; | |
10019 | ||
10020 | /* Create the first one, so we have something to add to. */ | |
0a2d3d69 | 10021 | descr = loc_descriptor (XEXP (RTVEC_ELT (par_elems, 0), 0), true); |
d44c7e36 DB |
10022 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, 0), 0)); |
10023 | add_loc_descr (&descr, | |
10024 | new_loc_descr (DW_OP_piece, GET_MODE_SIZE (mode), 0)); | |
10025 | for (i = 1; i < num_elem; i++) | |
10026 | { | |
10027 | dw_loc_descr_ref temp; | |
10028 | ||
0a2d3d69 | 10029 | temp = loc_descriptor (XEXP (RTVEC_ELT (par_elems, i), 0), true); |
d44c7e36 DB |
10030 | add_loc_descr (&descr, temp); |
10031 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, i), 0)); | |
10032 | add_loc_descr (&descr, | |
10033 | new_loc_descr (DW_OP_piece, | |
10034 | GET_MODE_SIZE (mode), 0)); | |
10035 | } | |
10036 | } | |
10037 | add_AT_location_description (die, DW_AT_location, descr); | |
10038 | break; | |
10039 | ||
a3f97cbb | 10040 | default: |
71dfc51f | 10041 | abort (); |
a3f97cbb JW |
10042 | } |
10043 | } | |
10044 | ||
1bfb5f8f JM |
10045 | /* If we don't have a copy of this variable in memory for some reason (such |
10046 | as a C++ member constant that doesn't have an out-of-line definition), | |
10047 | we should tell the debugger about the constant value. */ | |
10048 | ||
10049 | static void | |
7080f735 | 10050 | tree_add_const_value_attribute (dw_die_ref var_die, tree decl) |
1bfb5f8f JM |
10051 | { |
10052 | tree init = DECL_INITIAL (decl); | |
10053 | tree type = TREE_TYPE (decl); | |
10054 | ||
10055 | if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl) && init | |
10056 | && initializer_constant_valid_p (init, type) == null_pointer_node) | |
10057 | /* OK */; | |
10058 | else | |
10059 | return; | |
10060 | ||
10061 | switch (TREE_CODE (type)) | |
10062 | { | |
10063 | case INTEGER_TYPE: | |
10064 | if (host_integerp (init, 0)) | |
10065 | add_AT_unsigned (var_die, DW_AT_const_value, | |
2ad9852d | 10066 | tree_low_cst (init, 0)); |
1bfb5f8f JM |
10067 | else |
10068 | add_AT_long_long (var_die, DW_AT_const_value, | |
10069 | TREE_INT_CST_HIGH (init), | |
10070 | TREE_INT_CST_LOW (init)); | |
10071 | break; | |
10072 | ||
10073 | default:; | |
10074 | } | |
10075 | } | |
0b34cf1e | 10076 | |
b20b352b | 10077 | /* Generate a DW_AT_name attribute given some string value to be included as |
a3f97cbb | 10078 | the value of the attribute. */ |
71dfc51f | 10079 | |
c4274b22 | 10080 | static void |
7080f735 | 10081 | add_name_attribute (dw_die_ref die, const char *name_string) |
a3f97cbb | 10082 | { |
71dfc51f | 10083 | if (name_string != NULL && *name_string != 0) |
14a774a9 RK |
10084 | { |
10085 | if (demangle_name_func) | |
10086 | name_string = (*demangle_name_func) (name_string); | |
10087 | ||
10088 | add_AT_string (die, DW_AT_name, name_string); | |
10089 | } | |
a3f97cbb JW |
10090 | } |
10091 | ||
b20b352b | 10092 | /* Generate a DW_AT_comp_dir attribute for DIE. */ |
c4274b22 RH |
10093 | |
10094 | static void | |
7080f735 | 10095 | add_comp_dir_attribute (dw_die_ref die) |
c4274b22 | 10096 | { |
b20d9f0c | 10097 | const char *wd = get_src_pwd (); |
c4274b22 RH |
10098 | if (wd != NULL) |
10099 | add_AT_string (die, DW_AT_comp_dir, wd); | |
10100 | } | |
10101 | ||
a3f97cbb | 10102 | /* Given a tree node describing an array bound (either lower or upper) output |
466446b0 | 10103 | a representation for that bound. */ |
71dfc51f | 10104 | |
a3f97cbb | 10105 | static void |
7080f735 | 10106 | add_bound_info (dw_die_ref subrange_die, enum dwarf_attribute bound_attr, tree bound) |
a3f97cbb | 10107 | { |
a3f97cbb JW |
10108 | switch (TREE_CODE (bound)) |
10109 | { | |
10110 | case ERROR_MARK: | |
10111 | return; | |
10112 | ||
3ef42a0c | 10113 | /* All fixed-bounds are represented by INTEGER_CST nodes. */ |
a3f97cbb | 10114 | case INTEGER_CST: |
665f2503 RK |
10115 | if (! host_integerp (bound, 0) |
10116 | || (bound_attr == DW_AT_lower_bound | |
28985b81 | 10117 | && (((is_c_family () || is_java ()) && integer_zerop (bound)) |
665f2503 | 10118 | || (is_fortran () && integer_onep (bound))))) |
a1105617 | 10119 | /* Use the default. */ |
665f2503 | 10120 | ; |
141719a8 | 10121 | else |
665f2503 | 10122 | add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0)); |
a3f97cbb JW |
10123 | break; |
10124 | ||
b1ccbc24 | 10125 | case CONVERT_EXPR: |
a3f97cbb | 10126 | case NOP_EXPR: |
b1ccbc24 | 10127 | case NON_LVALUE_EXPR: |
ed239f5a | 10128 | case VIEW_CONVERT_EXPR: |
b1ccbc24 RK |
10129 | add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0)); |
10130 | break; | |
556273e0 | 10131 | |
a3f97cbb JW |
10132 | case SAVE_EXPR: |
10133 | /* If optimization is turned on, the SAVE_EXPRs that describe how to | |
73c68f61 SS |
10134 | access the upper bound values may be bogus. If they refer to a |
10135 | register, they may only describe how to get at these values at the | |
10136 | points in the generated code right after they have just been | |
10137 | computed. Worse yet, in the typical case, the upper bound values | |
10138 | will not even *be* computed in the optimized code (though the | |
10139 | number of elements will), so these SAVE_EXPRs are entirely | |
10140 | bogus. In order to compensate for this fact, we check here to see | |
10141 | if optimization is enabled, and if so, we don't add an attribute | |
10142 | for the (unknown and unknowable) upper bound. This should not | |
10143 | cause too much trouble for existing (stupid?) debuggers because | |
10144 | they have to deal with empty upper bounds location descriptions | |
10145 | anyway in order to be able to deal with incomplete array types. | |
10146 | Of course an intelligent debugger (GDB?) should be able to | |
10147 | comprehend that a missing upper bound specification in an array | |
10148 | type used for a storage class `auto' local array variable | |
10149 | indicates that the upper bound is both unknown (at compile- time) | |
10150 | and unknowable (at run-time) due to optimization. | |
466446b0 JM |
10151 | |
10152 | We assume that a MEM rtx is safe because gcc wouldn't put the | |
10153 | value there unless it was going to be used repeatedly in the | |
10154 | function, i.e. for cleanups. */ | |
1edf43d6 JM |
10155 | if (SAVE_EXPR_RTL (bound) |
10156 | && (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)) | |
a3f97cbb | 10157 | { |
b3694847 | 10158 | dw_die_ref ctx = lookup_decl_die (current_function_decl); |
54ba1f0d | 10159 | dw_die_ref decl_die = new_die (DW_TAG_variable, ctx, bound); |
b3694847 | 10160 | rtx loc = SAVE_EXPR_RTL (bound); |
f5963e61 JL |
10161 | |
10162 | /* If the RTL for the SAVE_EXPR is memory, handle the case where | |
10163 | it references an outer function's frame. */ | |
f5963e61 JL |
10164 | if (GET_CODE (loc) == MEM) |
10165 | { | |
10166 | rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound); | |
10167 | ||
10168 | if (XEXP (loc, 0) != new_addr) | |
c5c76735 | 10169 | loc = gen_rtx_MEM (GET_MODE (loc), new_addr); |
f5963e61 JL |
10170 | } |
10171 | ||
466446b0 JM |
10172 | add_AT_flag (decl_die, DW_AT_artificial, 1); |
10173 | add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx); | |
b9203463 | 10174 | add_AT_location_description (decl_die, DW_AT_location, |
0a2d3d69 | 10175 | loc_descriptor (loc, true)); |
466446b0 | 10176 | add_AT_die_ref (subrange_die, bound_attr, decl_die); |
a3f97cbb | 10177 | } |
71dfc51f RK |
10178 | |
10179 | /* Else leave out the attribute. */ | |
a3f97cbb | 10180 | break; |
3f76745e | 10181 | |
ef76d03b | 10182 | case VAR_DECL: |
d8041cc8 | 10183 | case PARM_DECL: |
6de9cd9a | 10184 | case RESULT_DECL: |
d8041cc8 RH |
10185 | { |
10186 | dw_die_ref decl_die = lookup_decl_die (bound); | |
10187 | ||
10188 | /* ??? Can this happen, or should the variable have been bound | |
10189 | first? Probably it can, since I imagine that we try to create | |
10190 | the types of parameters in the order in which they exist in | |
0b34cf1e | 10191 | the list, and won't have created a forward reference to a |
d8041cc8 RH |
10192 | later parameter. */ |
10193 | if (decl_die != NULL) | |
10194 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
10195 | break; | |
10196 | } | |
ef76d03b | 10197 | |
3f76745e | 10198 | default: |
d8041cc8 RH |
10199 | { |
10200 | /* Otherwise try to create a stack operation procedure to | |
10201 | evaluate the value of the array bound. */ | |
10202 | ||
10203 | dw_die_ref ctx, decl_die; | |
10204 | dw_loc_descr_ref loc; | |
10205 | ||
10206 | loc = loc_descriptor_from_tree (bound, 0); | |
10207 | if (loc == NULL) | |
10208 | break; | |
10209 | ||
e7af1d45 RK |
10210 | if (current_function_decl == 0) |
10211 | ctx = comp_unit_die; | |
10212 | else | |
10213 | ctx = lookup_decl_die (current_function_decl); | |
d8041cc8 | 10214 | |
aea9695c RK |
10215 | /* If we weren't able to find a context, it's most likely the case |
10216 | that we are processing the return type of the function. So | |
10217 | make a SAVE_EXPR to point to it and have the limbo DIE code | |
10218 | find the proper die. The save_expr function doesn't always | |
10219 | make a SAVE_EXPR, so do it ourselves. */ | |
10220 | if (ctx == 0) | |
10221 | bound = build (SAVE_EXPR, TREE_TYPE (bound), bound, | |
10222 | current_function_decl, NULL_TREE); | |
10223 | ||
54ba1f0d | 10224 | decl_die = new_die (DW_TAG_variable, ctx, bound); |
d8041cc8 RH |
10225 | add_AT_flag (decl_die, DW_AT_artificial, 1); |
10226 | add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx); | |
10227 | add_AT_loc (decl_die, DW_AT_location, loc); | |
10228 | ||
10229 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
10230 | break; | |
10231 | } | |
a3f97cbb JW |
10232 | } |
10233 | } | |
10234 | ||
10235 | /* Note that the block of subscript information for an array type also | |
10236 | includes information about the element type of type given array type. */ | |
71dfc51f | 10237 | |
a3f97cbb | 10238 | static void |
7080f735 | 10239 | add_subscript_info (dw_die_ref type_die, tree type) |
a3f97cbb | 10240 | { |
081f5e7e | 10241 | #ifndef MIPS_DEBUGGING_INFO |
b3694847 | 10242 | unsigned dimension_number; |
081f5e7e | 10243 | #endif |
b3694847 SS |
10244 | tree lower, upper; |
10245 | dw_die_ref subrange_die; | |
a3f97cbb | 10246 | |
556273e0 | 10247 | /* The GNU compilers represent multidimensional array types as sequences of |
a3f97cbb JW |
10248 | one dimensional array types whose element types are themselves array |
10249 | types. Here we squish that down, so that each multidimensional array | |
556273e0 | 10250 | type gets only one array_type DIE in the Dwarf debugging info. The draft |
a3f97cbb JW |
10251 | Dwarf specification say that we are allowed to do this kind of |
10252 | compression in C (because there is no difference between an array or | |
556273e0 | 10253 | arrays and a multidimensional array in C) but for other source languages |
a3f97cbb | 10254 | (e.g. Ada) we probably shouldn't do this. */ |
71dfc51f | 10255 | |
a3f97cbb JW |
10256 | /* ??? The SGI dwarf reader fails for multidimensional arrays with a |
10257 | const enum type. E.g. const enum machine_mode insn_operand_mode[2][10]. | |
10258 | We work around this by disabling this feature. See also | |
10259 | gen_array_type_die. */ | |
10260 | #ifndef MIPS_DEBUGGING_INFO | |
10261 | for (dimension_number = 0; | |
10262 | TREE_CODE (type) == ARRAY_TYPE; | |
10263 | type = TREE_TYPE (type), dimension_number++) | |
a3f97cbb | 10264 | #endif |
2ad9852d | 10265 | { |
b3694847 | 10266 | tree domain = TYPE_DOMAIN (type); |
a3f97cbb JW |
10267 | |
10268 | /* Arrays come in three flavors: Unspecified bounds, fixed bounds, | |
556273e0 | 10269 | and (in GNU C only) variable bounds. Handle all three forms |
73c68f61 | 10270 | here. */ |
54ba1f0d | 10271 | subrange_die = new_die (DW_TAG_subrange_type, type_die, NULL); |
a3f97cbb JW |
10272 | if (domain) |
10273 | { | |
10274 | /* We have an array type with specified bounds. */ | |
10275 | lower = TYPE_MIN_VALUE (domain); | |
10276 | upper = TYPE_MAX_VALUE (domain); | |
10277 | ||
beb235f8 | 10278 | /* Define the index type. */ |
a9d38797 | 10279 | if (TREE_TYPE (domain)) |
ef76d03b JW |
10280 | { |
10281 | /* ??? This is probably an Ada unnamed subrange type. Ignore the | |
10282 | TREE_TYPE field. We can't emit debug info for this | |
10283 | because it is an unnamed integral type. */ | |
10284 | if (TREE_CODE (domain) == INTEGER_TYPE | |
10285 | && TYPE_NAME (domain) == NULL_TREE | |
10286 | && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE | |
10287 | && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE) | |
556273e0 | 10288 | ; |
ef76d03b JW |
10289 | else |
10290 | add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0, | |
10291 | type_die); | |
10292 | } | |
a9d38797 | 10293 | |
e1ee5cdc RH |
10294 | /* ??? If upper is NULL, the array has unspecified length, |
10295 | but it does have a lower bound. This happens with Fortran | |
10296 | dimension arr(N:*) | |
7080f735 | 10297 | Since the debugger is definitely going to need to know N |
e1ee5cdc RH |
10298 | to produce useful results, go ahead and output the lower |
10299 | bound solo, and hope the debugger can cope. */ | |
10300 | ||
141719a8 | 10301 | add_bound_info (subrange_die, DW_AT_lower_bound, lower); |
e1ee5cdc RH |
10302 | if (upper) |
10303 | add_bound_info (subrange_die, DW_AT_upper_bound, upper); | |
a3f97cbb | 10304 | } |
71dfc51f | 10305 | |
2ad9852d RK |
10306 | /* Otherwise we have an array type with an unspecified length. The |
10307 | DWARF-2 spec does not say how to handle this; let's just leave out the | |
10308 | bounds. */ | |
a3f97cbb | 10309 | } |
a3f97cbb JW |
10310 | } |
10311 | ||
10312 | static void | |
7080f735 | 10313 | add_byte_size_attribute (dw_die_ref die, tree tree_node) |
a3f97cbb | 10314 | { |
b3694847 | 10315 | unsigned size; |
a3f97cbb JW |
10316 | |
10317 | switch (TREE_CODE (tree_node)) | |
10318 | { | |
10319 | case ERROR_MARK: | |
10320 | size = 0; | |
10321 | break; | |
10322 | case ENUMERAL_TYPE: | |
10323 | case RECORD_TYPE: | |
10324 | case UNION_TYPE: | |
10325 | case QUAL_UNION_TYPE: | |
10326 | size = int_size_in_bytes (tree_node); | |
10327 | break; | |
10328 | case FIELD_DECL: | |
10329 | /* For a data member of a struct or union, the DW_AT_byte_size is | |
73c68f61 SS |
10330 | generally given as the number of bytes normally allocated for an |
10331 | object of the *declared* type of the member itself. This is true | |
10332 | even for bit-fields. */ | |
a3f97cbb JW |
10333 | size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT; |
10334 | break; | |
10335 | default: | |
10336 | abort (); | |
10337 | } | |
10338 | ||
10339 | /* Note that `size' might be -1 when we get to this point. If it is, that | |
10340 | indicates that the byte size of the entity in question is variable. We | |
10341 | have no good way of expressing this fact in Dwarf at the present time, | |
10342 | so just let the -1 pass on through. */ | |
a3f97cbb JW |
10343 | add_AT_unsigned (die, DW_AT_byte_size, size); |
10344 | } | |
10345 | ||
10346 | /* For a FIELD_DECL node which represents a bit-field, output an attribute | |
10347 | which specifies the distance in bits from the highest order bit of the | |
10348 | "containing object" for the bit-field to the highest order bit of the | |
10349 | bit-field itself. | |
10350 | ||
2ad9852d RK |
10351 | For any given bit-field, the "containing object" is a hypothetical object |
10352 | (of some integral or enum type) within which the given bit-field lives. The | |
10353 | type of this hypothetical "containing object" is always the same as the | |
10354 | declared type of the individual bit-field itself. The determination of the | |
10355 | exact location of the "containing object" for a bit-field is rather | |
10356 | complicated. It's handled by the `field_byte_offset' function (above). | |
a3f97cbb JW |
10357 | |
10358 | Note that it is the size (in bytes) of the hypothetical "containing object" | |
10359 | which will be given in the DW_AT_byte_size attribute for this bit-field. | |
10360 | (See `byte_size_attribute' above). */ | |
71dfc51f RK |
10361 | |
10362 | static inline void | |
7080f735 | 10363 | add_bit_offset_attribute (dw_die_ref die, tree decl) |
a3f97cbb | 10364 | { |
665f2503 RK |
10365 | HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl); |
10366 | tree type = DECL_BIT_FIELD_TYPE (decl); | |
10367 | HOST_WIDE_INT bitpos_int; | |
10368 | HOST_WIDE_INT highest_order_object_bit_offset; | |
10369 | HOST_WIDE_INT highest_order_field_bit_offset; | |
10370 | HOST_WIDE_INT unsigned bit_offset; | |
a3f97cbb | 10371 | |
3a88cbd1 JL |
10372 | /* Must be a field and a bit field. */ |
10373 | if (!type | |
10374 | || TREE_CODE (decl) != FIELD_DECL) | |
10375 | abort (); | |
a3f97cbb JW |
10376 | |
10377 | /* We can't yet handle bit-fields whose offsets are variable, so if we | |
10378 | encounter such things, just return without generating any attribute | |
665f2503 RK |
10379 | whatsoever. Likewise for variable or too large size. */ |
10380 | if (! host_integerp (bit_position (decl), 0) | |
10381 | || ! host_integerp (DECL_SIZE (decl), 1)) | |
71dfc51f RK |
10382 | return; |
10383 | ||
665f2503 | 10384 | bitpos_int = int_bit_position (decl); |
a3f97cbb JW |
10385 | |
10386 | /* Note that the bit offset is always the distance (in bits) from the | |
556273e0 KH |
10387 | highest-order bit of the "containing object" to the highest-order bit of |
10388 | the bit-field itself. Since the "high-order end" of any object or field | |
a3f97cbb JW |
10389 | is different on big-endian and little-endian machines, the computation |
10390 | below must take account of these differences. */ | |
10391 | highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT; | |
10392 | highest_order_field_bit_offset = bitpos_int; | |
10393 | ||
71dfc51f | 10394 | if (! BYTES_BIG_ENDIAN) |
a3f97cbb | 10395 | { |
665f2503 | 10396 | highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0); |
a3f97cbb JW |
10397 | highest_order_object_bit_offset += simple_type_size_in_bits (type); |
10398 | } | |
71dfc51f RK |
10399 | |
10400 | bit_offset | |
10401 | = (! BYTES_BIG_ENDIAN | |
10402 | ? highest_order_object_bit_offset - highest_order_field_bit_offset | |
10403 | : highest_order_field_bit_offset - highest_order_object_bit_offset); | |
a3f97cbb JW |
10404 | |
10405 | add_AT_unsigned (die, DW_AT_bit_offset, bit_offset); | |
10406 | } | |
10407 | ||
10408 | /* For a FIELD_DECL node which represents a bit field, output an attribute | |
10409 | which specifies the length in bits of the given field. */ | |
71dfc51f RK |
10410 | |
10411 | static inline void | |
7080f735 | 10412 | add_bit_size_attribute (dw_die_ref die, tree decl) |
a3f97cbb | 10413 | { |
3a88cbd1 JL |
10414 | /* Must be a field and a bit field. */ |
10415 | if (TREE_CODE (decl) != FIELD_DECL | |
10416 | || ! DECL_BIT_FIELD_TYPE (decl)) | |
10417 | abort (); | |
665f2503 RK |
10418 | |
10419 | if (host_integerp (DECL_SIZE (decl), 1)) | |
10420 | add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1)); | |
a3f97cbb JW |
10421 | } |
10422 | ||
88dad228 | 10423 | /* If the compiled language is ANSI C, then add a 'prototyped' |
a3f97cbb | 10424 | attribute, if arg types are given for the parameters of a function. */ |
71dfc51f RK |
10425 | |
10426 | static inline void | |
7080f735 | 10427 | add_prototyped_attribute (dw_die_ref die, tree func_type) |
a3f97cbb | 10428 | { |
88dad228 JM |
10429 | if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89 |
10430 | && TYPE_ARG_TYPES (func_type) != NULL) | |
10431 | add_AT_flag (die, DW_AT_prototyped, 1); | |
a3f97cbb JW |
10432 | } |
10433 | ||
a3f97cbb JW |
10434 | /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found |
10435 | by looking in either the type declaration or object declaration | |
10436 | equate table. */ | |
71dfc51f RK |
10437 | |
10438 | static inline void | |
7080f735 | 10439 | add_abstract_origin_attribute (dw_die_ref die, tree origin) |
a3f97cbb JW |
10440 | { |
10441 | dw_die_ref origin_die = NULL; | |
bbc6ae08 | 10442 | |
d10b8e05 | 10443 | if (TREE_CODE (origin) != FUNCTION_DECL) |
e40a1c67 JM |
10444 | { |
10445 | /* We may have gotten separated from the block for the inlined | |
10446 | function, if we're in an exception handler or some such; make | |
10447 | sure that the abstract function has been written out. | |
10448 | ||
73c68f61 | 10449 | Doing this for nested functions is wrong, however; functions are |
e40a1c67 | 10450 | distinct units, and our context might not even be inline. */ |
fb13d4d0 | 10451 | tree fn = origin; |
2ad9852d | 10452 | |
fb13d4d0 JM |
10453 | if (TYPE_P (fn)) |
10454 | fn = TYPE_STUB_DECL (fn); | |
2ad9852d | 10455 | |
fb13d4d0 | 10456 | fn = decl_function_context (fn); |
e40a1c67 | 10457 | if (fn) |
1edf43d6 | 10458 | dwarf2out_abstract_function (fn); |
e40a1c67 | 10459 | } |
44db1d9c | 10460 | |
2f939d94 | 10461 | if (DECL_P (origin)) |
71dfc51f | 10462 | origin_die = lookup_decl_die (origin); |
2f939d94 | 10463 | else if (TYPE_P (origin)) |
71dfc51f RK |
10464 | origin_die = lookup_type_die (origin); |
10465 | ||
bbc6ae08 | 10466 | if (origin_die == NULL) |
1ae8994f | 10467 | abort (); |
556273e0 | 10468 | |
a3f97cbb JW |
10469 | add_AT_die_ref (die, DW_AT_abstract_origin, origin_die); |
10470 | } | |
10471 | ||
bdb669cb JM |
10472 | /* We do not currently support the pure_virtual attribute. */ |
10473 | ||
71dfc51f | 10474 | static inline void |
7080f735 | 10475 | add_pure_or_virtual_attribute (dw_die_ref die, tree func_decl) |
a3f97cbb | 10476 | { |
a94dbf2c | 10477 | if (DECL_VINDEX (func_decl)) |
a3f97cbb | 10478 | { |
bdb669cb | 10479 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); |
665f2503 RK |
10480 | |
10481 | if (host_integerp (DECL_VINDEX (func_decl), 0)) | |
10482 | add_AT_loc (die, DW_AT_vtable_elem_location, | |
10483 | new_loc_descr (DW_OP_constu, | |
10484 | tree_low_cst (DECL_VINDEX (func_decl), 0), | |
10485 | 0)); | |
71dfc51f | 10486 | |
a94dbf2c JM |
10487 | /* GNU extension: Record what type this method came from originally. */ |
10488 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
10489 | add_AT_die_ref (die, DW_AT_containing_type, | |
10490 | lookup_type_die (DECL_CONTEXT (func_decl))); | |
a3f97cbb JW |
10491 | } |
10492 | } | |
10493 | \f | |
b2932ae5 | 10494 | /* Add source coordinate attributes for the given decl. */ |
71dfc51f | 10495 | |
b2932ae5 | 10496 | static void |
7080f735 | 10497 | add_src_coords_attributes (dw_die_ref die, tree decl) |
b2932ae5 | 10498 | { |
f31686a3 | 10499 | unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl)); |
71dfc51f | 10500 | |
b2932ae5 | 10501 | add_AT_unsigned (die, DW_AT_decl_file, file_index); |
f31686a3 | 10502 | add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl)); |
b2932ae5 JM |
10503 | } |
10504 | ||
b20b352b | 10505 | /* Add a DW_AT_name attribute and source coordinate attribute for the |
a3f97cbb | 10506 | given decl, but only if it actually has a name. */ |
71dfc51f | 10507 | |
a3f97cbb | 10508 | static void |
7080f735 | 10509 | add_name_and_src_coords_attributes (dw_die_ref die, tree decl) |
a3f97cbb | 10510 | { |
b3694847 | 10511 | tree decl_name; |
71dfc51f | 10512 | |
556273e0 | 10513 | decl_name = DECL_NAME (decl); |
71dfc51f | 10514 | if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL) |
a3f97cbb | 10515 | { |
a1d7ffe3 | 10516 | add_name_attribute (die, dwarf2_name (decl, 0)); |
a96c67ec JM |
10517 | if (! DECL_ARTIFICIAL (decl)) |
10518 | add_src_coords_attributes (die, decl); | |
e689ae67 | 10519 | |
a1d7ffe3 | 10520 | if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL) |
bc808e0b | 10521 | && TREE_PUBLIC (decl) |
5daf7c0a JM |
10522 | && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl) |
10523 | && !DECL_ABSTRACT (decl)) | |
a1d7ffe3 JM |
10524 | add_AT_string (die, DW_AT_MIPS_linkage_name, |
10525 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); | |
a3f97cbb | 10526 | } |
7a0c8d71 DR |
10527 | |
10528 | #ifdef VMS_DEBUGGING_INFO | |
7a0c8d71 DR |
10529 | /* Get the function's name, as described by its RTL. This may be different |
10530 | from the DECL_NAME name used in the source file. */ | |
10531 | if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl)) | |
c470afad RK |
10532 | { |
10533 | add_AT_addr (die, DW_AT_VMS_rtnbeg_pd_address, | |
10534 | XEXP (DECL_RTL (decl), 0)); | |
10535 | VARRAY_PUSH_RTX (used_rtx_varray, XEXP (DECL_RTL (decl), 0)); | |
10536 | } | |
7a0c8d71 | 10537 | #endif |
a3f97cbb JW |
10538 | } |
10539 | ||
556273e0 | 10540 | /* Push a new declaration scope. */ |
71dfc51f | 10541 | |
a3f97cbb | 10542 | static void |
7080f735 | 10543 | push_decl_scope (tree scope) |
a3f97cbb | 10544 | { |
244a4af0 | 10545 | VARRAY_PUSH_TREE (decl_scope_table, scope); |
a3f97cbb JW |
10546 | } |
10547 | ||
777ad4c2 | 10548 | /* Pop a declaration scope. */ |
2ad9852d | 10549 | |
777ad4c2 | 10550 | static inline void |
7080f735 | 10551 | pop_decl_scope (void) |
777ad4c2 | 10552 | { |
244a4af0 | 10553 | if (VARRAY_ACTIVE_SIZE (decl_scope_table) <= 0) |
777ad4c2 | 10554 | abort (); |
2ad9852d | 10555 | |
244a4af0 | 10556 | VARRAY_POP (decl_scope_table); |
777ad4c2 JM |
10557 | } |
10558 | ||
10559 | /* Return the DIE for the scope that immediately contains this type. | |
10560 | Non-named types get global scope. Named types nested in other | |
10561 | types get their containing scope if it's open, or global scope | |
10562 | otherwise. All other types (i.e. function-local named types) get | |
10563 | the current active scope. */ | |
71dfc51f | 10564 | |
a3f97cbb | 10565 | static dw_die_ref |
7080f735 | 10566 | scope_die_for (tree t, dw_die_ref context_die) |
a3f97cbb | 10567 | { |
b3694847 SS |
10568 | dw_die_ref scope_die = NULL; |
10569 | tree containing_scope; | |
10570 | int i; | |
a3f97cbb | 10571 | |
777ad4c2 JM |
10572 | /* Non-types always go in the current scope. */ |
10573 | if (! TYPE_P (t)) | |
10574 | abort (); | |
10575 | ||
10576 | containing_scope = TYPE_CONTEXT (t); | |
ab72d377 | 10577 | |
66c78aa9 | 10578 | /* Use the containing namespace if it was passed in (for a declaration). */ |
2addbe1d | 10579 | if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL) |
66c78aa9 JM |
10580 | { |
10581 | if (context_die == lookup_decl_die (containing_scope)) | |
10582 | /* OK */; | |
10583 | else | |
10584 | containing_scope = NULL_TREE; | |
10585 | } | |
2addbe1d | 10586 | |
5f2f160c JM |
10587 | /* Ignore function type "scopes" from the C frontend. They mean that |
10588 | a tagged type is local to a parmlist of a function declarator, but | |
10589 | that isn't useful to DWARF. */ | |
10590 | if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE) | |
10591 | containing_scope = NULL_TREE; | |
10592 | ||
71dfc51f RK |
10593 | if (containing_scope == NULL_TREE) |
10594 | scope_die = comp_unit_die; | |
777ad4c2 | 10595 | else if (TYPE_P (containing_scope)) |
348bb3c7 | 10596 | { |
777ad4c2 JM |
10597 | /* For types, we can just look up the appropriate DIE. But |
10598 | first we check to see if we're in the middle of emitting it | |
10599 | so we know where the new DIE should go. */ | |
244a4af0 TF |
10600 | for (i = VARRAY_ACTIVE_SIZE (decl_scope_table) - 1; i >= 0; --i) |
10601 | if (VARRAY_TREE (decl_scope_table, i) == containing_scope) | |
348bb3c7 JM |
10602 | break; |
10603 | ||
10604 | if (i < 0) | |
10605 | { | |
348bb3c7 JM |
10606 | if (debug_info_level > DINFO_LEVEL_TERSE |
10607 | && !TREE_ASM_WRITTEN (containing_scope)) | |
10608 | abort (); | |
10609 | ||
10610 | /* If none of the current dies are suitable, we get file scope. */ | |
10611 | scope_die = comp_unit_die; | |
10612 | } | |
10613 | else | |
777ad4c2 | 10614 | scope_die = lookup_type_die (containing_scope); |
348bb3c7 | 10615 | } |
a3f97cbb | 10616 | else |
777ad4c2 | 10617 | scope_die = context_die; |
71dfc51f | 10618 | |
a3f97cbb JW |
10619 | return scope_die; |
10620 | } | |
10621 | ||
2ad9852d | 10622 | /* Returns nonzero if CONTEXT_DIE is internal to a function. */ |
777ad4c2 JM |
10623 | |
10624 | static inline int | |
7080f735 | 10625 | local_scope_p (dw_die_ref context_die) |
a3f97cbb | 10626 | { |
777ad4c2 JM |
10627 | for (; context_die; context_die = context_die->die_parent) |
10628 | if (context_die->die_tag == DW_TAG_inlined_subroutine | |
10629 | || context_die->die_tag == DW_TAG_subprogram) | |
10630 | return 1; | |
2ad9852d | 10631 | |
777ad4c2 | 10632 | return 0; |
a3f97cbb JW |
10633 | } |
10634 | ||
66c78aa9 JM |
10635 | /* Returns nonzero if CONTEXT_DIE is a class or namespace, for deciding |
10636 | whether or not to treat a DIE in this context as a declaration. */ | |
9765e357 JM |
10637 | |
10638 | static inline int | |
66c78aa9 | 10639 | class_or_namespace_scope_p (dw_die_ref context_die) |
9765e357 JM |
10640 | { |
10641 | return (context_die | |
10642 | && (context_die->die_tag == DW_TAG_structure_type | |
66c78aa9 JM |
10643 | || context_die->die_tag == DW_TAG_union_type |
10644 | || context_die->die_tag == DW_TAG_namespace)); | |
9765e357 JM |
10645 | } |
10646 | ||
a3f97cbb JW |
10647 | /* Many forms of DIEs require a "type description" attribute. This |
10648 | routine locates the proper "type descriptor" die for the type given | |
b20b352b | 10649 | by 'type', and adds a DW_AT_type attribute below the given die. */ |
71dfc51f | 10650 | |
a3f97cbb | 10651 | static void |
7080f735 AJ |
10652 | add_type_attribute (dw_die_ref object_die, tree type, int decl_const, |
10653 | int decl_volatile, dw_die_ref context_die) | |
a3f97cbb | 10654 | { |
b3694847 SS |
10655 | enum tree_code code = TREE_CODE (type); |
10656 | dw_die_ref type_die = NULL; | |
a3f97cbb | 10657 | |
ef76d03b JW |
10658 | /* ??? If this type is an unnamed subrange type of an integral or |
10659 | floating-point type, use the inner type. This is because we have no | |
10660 | support for unnamed types in base_type_die. This can happen if this is | |
10661 | an Ada subrange type. Correct solution is emit a subrange type die. */ | |
b1ccbc24 RK |
10662 | if ((code == INTEGER_TYPE || code == REAL_TYPE) |
10663 | && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0) | |
10664 | type = TREE_TYPE (type), code = TREE_CODE (type); | |
10665 | ||
2ad9852d RK |
10666 | if (code == ERROR_MARK |
10667 | /* Handle a special case. For functions whose return type is void, we | |
10668 | generate *no* type attribute. (Note that no object may have type | |
10669 | `void', so this only applies to function return types). */ | |
10670 | || code == VOID_TYPE) | |
b1ccbc24 | 10671 | return; |
a3f97cbb | 10672 | |
a3f97cbb JW |
10673 | type_die = modified_type_die (type, |
10674 | decl_const || TYPE_READONLY (type), | |
10675 | decl_volatile || TYPE_VOLATILE (type), | |
ab72d377 | 10676 | context_die); |
2ad9852d | 10677 | |
a3f97cbb | 10678 | if (type_die != NULL) |
71dfc51f | 10679 | add_AT_die_ref (object_die, DW_AT_type, type_die); |
a3f97cbb JW |
10680 | } |
10681 | ||
10682 | /* Given a tree pointer to a struct, class, union, or enum type node, return | |
10683 | a pointer to the (string) tag name for the given type, or zero if the type | |
10684 | was declared without a tag. */ | |
71dfc51f | 10685 | |
d3e3972c | 10686 | static const char * |
7080f735 | 10687 | type_tag (tree type) |
a3f97cbb | 10688 | { |
b3694847 | 10689 | const char *name = 0; |
a3f97cbb JW |
10690 | |
10691 | if (TYPE_NAME (type) != 0) | |
10692 | { | |
b3694847 | 10693 | tree t = 0; |
a3f97cbb JW |
10694 | |
10695 | /* Find the IDENTIFIER_NODE for the type name. */ | |
10696 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
10697 | t = TYPE_NAME (type); | |
bdb669cb | 10698 | |
556273e0 | 10699 | /* The g++ front end makes the TYPE_NAME of *each* tagged type point to |
73c68f61 SS |
10700 | a TYPE_DECL node, regardless of whether or not a `typedef' was |
10701 | involved. */ | |
a94dbf2c JM |
10702 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
10703 | && ! DECL_IGNORED_P (TYPE_NAME (type))) | |
a3f97cbb | 10704 | t = DECL_NAME (TYPE_NAME (type)); |
bdb669cb | 10705 | |
a3f97cbb JW |
10706 | /* Now get the name as a string, or invent one. */ |
10707 | if (t != 0) | |
a94dbf2c | 10708 | name = IDENTIFIER_POINTER (t); |
a3f97cbb | 10709 | } |
71dfc51f | 10710 | |
a3f97cbb JW |
10711 | return (name == 0 || *name == '\0') ? 0 : name; |
10712 | } | |
10713 | ||
10714 | /* Return the type associated with a data member, make a special check | |
10715 | for bit field types. */ | |
71dfc51f RK |
10716 | |
10717 | static inline tree | |
7080f735 | 10718 | member_declared_type (tree member) |
a3f97cbb | 10719 | { |
71dfc51f | 10720 | return (DECL_BIT_FIELD_TYPE (member) |
2ad9852d | 10721 | ? DECL_BIT_FIELD_TYPE (member) : TREE_TYPE (member)); |
a3f97cbb JW |
10722 | } |
10723 | ||
d291dd49 | 10724 | /* Get the decl's label, as described by its RTL. This may be different |
a3f97cbb | 10725 | from the DECL_NAME name used in the source file. */ |
71dfc51f | 10726 | |
487a6e06 | 10727 | #if 0 |
d3e3972c | 10728 | static const char * |
7080f735 | 10729 | decl_start_label (tree decl) |
a3f97cbb JW |
10730 | { |
10731 | rtx x; | |
d3e3972c | 10732 | const char *fnname; |
2ad9852d | 10733 | |
a3f97cbb JW |
10734 | x = DECL_RTL (decl); |
10735 | if (GET_CODE (x) != MEM) | |
71dfc51f RK |
10736 | abort (); |
10737 | ||
a3f97cbb JW |
10738 | x = XEXP (x, 0); |
10739 | if (GET_CODE (x) != SYMBOL_REF) | |
71dfc51f RK |
10740 | abort (); |
10741 | ||
a3f97cbb JW |
10742 | fnname = XSTR (x, 0); |
10743 | return fnname; | |
10744 | } | |
487a6e06 | 10745 | #endif |
a3f97cbb | 10746 | \f |
956d6950 | 10747 | /* These routines generate the internal representation of the DIE's for |
a3f97cbb | 10748 | the compilation unit. Debugging information is collected by walking |
88dad228 | 10749 | the declaration trees passed in from dwarf2out_decl(). */ |
a3f97cbb JW |
10750 | |
10751 | static void | |
7080f735 | 10752 | gen_array_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 10753 | { |
b3694847 SS |
10754 | dw_die_ref scope_die = scope_die_for (type, context_die); |
10755 | dw_die_ref array_die; | |
10756 | tree element_type; | |
bdb669cb | 10757 | |
a9d38797 JM |
10758 | /* ??? The SGI dwarf reader fails for array of array of enum types unless |
10759 | the inner array type comes before the outer array type. Thus we must | |
10760 | call gen_type_die before we call new_die. See below also. */ | |
10761 | #ifdef MIPS_DEBUGGING_INFO | |
10762 | gen_type_die (TREE_TYPE (type), context_die); | |
10763 | #endif | |
10764 | ||
54ba1f0d | 10765 | array_die = new_die (DW_TAG_array_type, scope_die, type); |
84f0ace0 JM |
10766 | add_name_attribute (array_die, type_tag (type)); |
10767 | equate_type_number_to_die (type, array_die); | |
10768 | ||
10769 | if (TREE_CODE (type) == VECTOR_TYPE) | |
10770 | { | |
10771 | /* The frontend feeds us a representation for the vector as a struct | |
10772 | containing an array. Pull out the array type. */ | |
10773 | type = TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type))); | |
10774 | add_AT_flag (array_die, DW_AT_GNU_vector, 1); | |
10775 | } | |
a9d38797 | 10776 | |
a3f97cbb JW |
10777 | #if 0 |
10778 | /* We default the array ordering. SDB will probably do | |
10779 | the right things even if DW_AT_ordering is not present. It's not even | |
10780 | an issue until we start to get into multidimensional arrays anyway. If | |
10781 | SDB is ever caught doing the Wrong Thing for multi-dimensional arrays, | |
10782 | then we'll have to put the DW_AT_ordering attribute back in. (But if | |
10783 | and when we find out that we need to put these in, we will only do so | |
10784 | for multidimensional arrays. */ | |
10785 | add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major); | |
10786 | #endif | |
10787 | ||
a9d38797 | 10788 | #ifdef MIPS_DEBUGGING_INFO |
4edb7b60 JM |
10789 | /* The SGI compilers handle arrays of unknown bound by setting |
10790 | AT_declaration and not emitting any subrange DIEs. */ | |
a9d38797 | 10791 | if (! TYPE_DOMAIN (type)) |
371e8c4f | 10792 | add_AT_flag (array_die, DW_AT_declaration, 1); |
a9d38797 JM |
10793 | else |
10794 | #endif | |
10795 | add_subscript_info (array_die, type); | |
a3f97cbb | 10796 | |
a3f97cbb JW |
10797 | /* Add representation of the type of the elements of this array type. */ |
10798 | element_type = TREE_TYPE (type); | |
71dfc51f | 10799 | |
a3f97cbb JW |
10800 | /* ??? The SGI dwarf reader fails for multidimensional arrays with a |
10801 | const enum type. E.g. const enum machine_mode insn_operand_mode[2][10]. | |
10802 | We work around this by disabling this feature. See also | |
10803 | add_subscript_info. */ | |
10804 | #ifndef MIPS_DEBUGGING_INFO | |
71dfc51f RK |
10805 | while (TREE_CODE (element_type) == ARRAY_TYPE) |
10806 | element_type = TREE_TYPE (element_type); | |
10807 | ||
a3f97cbb | 10808 | gen_type_die (element_type, context_die); |
a9d38797 | 10809 | #endif |
a3f97cbb JW |
10810 | |
10811 | add_type_attribute (array_die, element_type, 0, 0, context_die); | |
10812 | } | |
10813 | ||
10814 | static void | |
7080f735 | 10815 | gen_set_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 10816 | { |
b3694847 | 10817 | dw_die_ref type_die |
54ba1f0d | 10818 | = new_die (DW_TAG_set_type, scope_die_for (type, context_die), type); |
71dfc51f | 10819 | |
a3f97cbb | 10820 | equate_type_number_to_die (type, type_die); |
a3f97cbb JW |
10821 | add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die); |
10822 | } | |
10823 | ||
d6f4ec51 | 10824 | #if 0 |
a3f97cbb | 10825 | static void |
7080f735 | 10826 | gen_entry_point_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 10827 | { |
b3694847 | 10828 | tree origin = decl_ultimate_origin (decl); |
54ba1f0d | 10829 | dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die, decl); |
2ad9852d | 10830 | |
a3f97cbb | 10831 | if (origin != NULL) |
71dfc51f | 10832 | add_abstract_origin_attribute (decl_die, origin); |
a3f97cbb JW |
10833 | else |
10834 | { | |
10835 | add_name_and_src_coords_attributes (decl_die, decl); | |
a3f97cbb JW |
10836 | add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)), |
10837 | 0, 0, context_die); | |
10838 | } | |
71dfc51f | 10839 | |
a3f97cbb | 10840 | if (DECL_ABSTRACT (decl)) |
71dfc51f | 10841 | equate_decl_number_to_die (decl, decl_die); |
a3f97cbb | 10842 | else |
71dfc51f | 10843 | add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl)); |
a3f97cbb | 10844 | } |
d6f4ec51 | 10845 | #endif |
a3f97cbb | 10846 | |
8a8c3656 JM |
10847 | /* Walk through the list of incomplete types again, trying once more to |
10848 | emit full debugging info for them. */ | |
10849 | ||
10850 | static void | |
7080f735 | 10851 | retry_incomplete_types (void) |
8a8c3656 | 10852 | { |
244a4af0 | 10853 | int i; |
2ad9852d | 10854 | |
244a4af0 | 10855 | for (i = VARRAY_ACTIVE_SIZE (incomplete_types) - 1; i >= 0; i--) |
2ad9852d | 10856 | gen_type_die (VARRAY_TREE (incomplete_types, i), comp_unit_die); |
8a8c3656 JM |
10857 | } |
10858 | ||
a3f97cbb | 10859 | /* Generate a DIE to represent an inlined instance of an enumeration type. */ |
71dfc51f | 10860 | |
a3f97cbb | 10861 | static void |
7080f735 | 10862 | gen_inlined_enumeration_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 10863 | { |
54ba1f0d | 10864 | dw_die_ref type_die = new_die (DW_TAG_enumeration_type, context_die, type); |
2ad9852d | 10865 | |
bbc6ae08 NC |
10866 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
10867 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
10868 | add_abstract_origin_attribute (type_die, type); |
10869 | } | |
10870 | ||
10871 | /* Generate a DIE to represent an inlined instance of a structure type. */ | |
71dfc51f | 10872 | |
a3f97cbb | 10873 | static void |
7080f735 | 10874 | gen_inlined_structure_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 10875 | { |
54ba1f0d | 10876 | dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die, type); |
777ad4c2 | 10877 | |
bbc6ae08 NC |
10878 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
10879 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
10880 | add_abstract_origin_attribute (type_die, type); |
10881 | } | |
10882 | ||
10883 | /* Generate a DIE to represent an inlined instance of a union type. */ | |
71dfc51f | 10884 | |
a3f97cbb | 10885 | static void |
7080f735 | 10886 | gen_inlined_union_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 10887 | { |
54ba1f0d | 10888 | dw_die_ref type_die = new_die (DW_TAG_union_type, context_die, type); |
777ad4c2 | 10889 | |
bbc6ae08 NC |
10890 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
10891 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
10892 | add_abstract_origin_attribute (type_die, type); |
10893 | } | |
10894 | ||
10895 | /* Generate a DIE to represent an enumeration type. Note that these DIEs | |
10896 | include all of the information about the enumeration values also. Each | |
273dbe67 JM |
10897 | enumerated type name/value is listed as a child of the enumerated type |
10898 | DIE. */ | |
71dfc51f | 10899 | |
de99511b | 10900 | static dw_die_ref |
7080f735 | 10901 | gen_enumeration_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 10902 | { |
b3694847 | 10903 | dw_die_ref type_die = lookup_type_die (type); |
273dbe67 | 10904 | |
a3f97cbb JW |
10905 | if (type_die == NULL) |
10906 | { | |
10907 | type_die = new_die (DW_TAG_enumeration_type, | |
54ba1f0d | 10908 | scope_die_for (type, context_die), type); |
a3f97cbb JW |
10909 | equate_type_number_to_die (type, type_die); |
10910 | add_name_attribute (type_die, type_tag (type)); | |
a3f97cbb | 10911 | } |
273dbe67 | 10912 | else if (! TYPE_SIZE (type)) |
de99511b | 10913 | return type_die; |
273dbe67 JM |
10914 | else |
10915 | remove_AT (type_die, DW_AT_declaration); | |
10916 | ||
10917 | /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the | |
10918 | given enum type is incomplete, do not generate the DW_AT_byte_size | |
10919 | attribute or the DW_AT_element_list attribute. */ | |
10920 | if (TYPE_SIZE (type)) | |
a3f97cbb | 10921 | { |
b3694847 | 10922 | tree link; |
71dfc51f | 10923 | |
a082c85a | 10924 | TREE_ASM_WRITTEN (type) = 1; |
273dbe67 | 10925 | add_byte_size_attribute (type_die, type); |
e9a25f70 | 10926 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
b2932ae5 | 10927 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
71dfc51f | 10928 | |
ef76d03b JW |
10929 | /* If the first reference to this type was as the return type of an |
10930 | inline function, then it may not have a parent. Fix this now. */ | |
10931 | if (type_die->die_parent == NULL) | |
10932 | add_child_die (scope_die_for (type, context_die), type_die); | |
10933 | ||
eb34af89 | 10934 | for (link = TYPE_VALUES (type); |
273dbe67 | 10935 | link != NULL; link = TREE_CHAIN (link)) |
a3f97cbb | 10936 | { |
54ba1f0d | 10937 | dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die, link); |
5bb2ed2c | 10938 | tree value = TREE_VALUE (link); |
71dfc51f | 10939 | |
273dbe67 JM |
10940 | add_name_attribute (enum_die, |
10941 | IDENTIFIER_POINTER (TREE_PURPOSE (link))); | |
665f2503 | 10942 | |
8df83eae | 10943 | if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value)))) |
5bb2ed2c MM |
10944 | /* DWARF2 does not provide a way of indicating whether or |
10945 | not enumeration constants are signed or unsigned. GDB | |
10946 | always assumes the values are signed, so we output all | |
10947 | values as if they were signed. That means that | |
10948 | enumeration constants with very large unsigned values | |
10949 | will appear to have negative values in the debugger. */ | |
10950 | add_AT_int (enum_die, DW_AT_const_value, | |
10951 | tree_low_cst (value, tree_int_cst_sgn (value) > 0)); | |
a3f97cbb JW |
10952 | } |
10953 | } | |
273dbe67 JM |
10954 | else |
10955 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
de99511b B |
10956 | |
10957 | return type_die; | |
a3f97cbb JW |
10958 | } |
10959 | ||
a3f97cbb JW |
10960 | /* Generate a DIE to represent either a real live formal parameter decl or to |
10961 | represent just the type of some formal parameter position in some function | |
10962 | type. | |
71dfc51f | 10963 | |
a3f97cbb JW |
10964 | Note that this routine is a bit unusual because its argument may be a |
10965 | ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which | |
10966 | represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE | |
10967 | node. If it's the former then this function is being called to output a | |
10968 | DIE to represent a formal parameter object (or some inlining thereof). If | |
10969 | it's the latter, then this function is only being called to output a | |
10970 | DW_TAG_formal_parameter DIE to stand as a placeholder for some formal | |
10971 | argument type of some subprogram type. */ | |
71dfc51f | 10972 | |
a94dbf2c | 10973 | static dw_die_ref |
7080f735 | 10974 | gen_formal_parameter_die (tree node, dw_die_ref context_die) |
a3f97cbb | 10975 | { |
b3694847 | 10976 | dw_die_ref parm_die |
54ba1f0d | 10977 | = new_die (DW_TAG_formal_parameter, context_die, node); |
b3694847 | 10978 | tree origin; |
71dfc51f | 10979 | |
a3f97cbb JW |
10980 | switch (TREE_CODE_CLASS (TREE_CODE (node))) |
10981 | { | |
a3f97cbb JW |
10982 | case 'd': |
10983 | origin = decl_ultimate_origin (node); | |
10984 | if (origin != NULL) | |
a94dbf2c | 10985 | add_abstract_origin_attribute (parm_die, origin); |
a3f97cbb JW |
10986 | else |
10987 | { | |
10988 | add_name_and_src_coords_attributes (parm_die, node); | |
10989 | add_type_attribute (parm_die, TREE_TYPE (node), | |
10990 | TREE_READONLY (node), | |
10991 | TREE_THIS_VOLATILE (node), | |
10992 | context_die); | |
bdb669cb JM |
10993 | if (DECL_ARTIFICIAL (node)) |
10994 | add_AT_flag (parm_die, DW_AT_artificial, 1); | |
a3f97cbb | 10995 | } |
71dfc51f | 10996 | |
141719a8 JM |
10997 | equate_decl_number_to_die (node, parm_die); |
10998 | if (! DECL_ABSTRACT (node)) | |
0a2d3d69 | 10999 | add_location_or_const_value_attribute (parm_die, node, DW_AT_location); |
71dfc51f | 11000 | |
a3f97cbb JW |
11001 | break; |
11002 | ||
a3f97cbb | 11003 | case 't': |
71dfc51f | 11004 | /* We were called with some kind of a ..._TYPE node. */ |
a3f97cbb JW |
11005 | add_type_attribute (parm_die, node, 0, 0, context_die); |
11006 | break; | |
11007 | ||
a3f97cbb JW |
11008 | default: |
11009 | abort (); | |
11010 | } | |
71dfc51f | 11011 | |
a94dbf2c | 11012 | return parm_die; |
a3f97cbb JW |
11013 | } |
11014 | ||
11015 | /* Generate a special type of DIE used as a stand-in for a trailing ellipsis | |
11016 | at the end of an (ANSI prototyped) formal parameters list. */ | |
71dfc51f | 11017 | |
a3f97cbb | 11018 | static void |
7080f735 | 11019 | gen_unspecified_parameters_die (tree decl_or_type, dw_die_ref context_die) |
a3f97cbb | 11020 | { |
54ba1f0d | 11021 | new_die (DW_TAG_unspecified_parameters, context_die, decl_or_type); |
a3f97cbb JW |
11022 | } |
11023 | ||
11024 | /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a | |
11025 | DW_TAG_unspecified_parameters DIE) to represent the types of the formal | |
11026 | parameters as specified in some function type specification (except for | |
1cfdcc15 | 11027 | those which appear as part of a function *definition*). */ |
71dfc51f | 11028 | |
a3f97cbb | 11029 | static void |
7080f735 | 11030 | gen_formal_types_die (tree function_or_method_type, dw_die_ref context_die) |
a3f97cbb | 11031 | { |
b3694847 SS |
11032 | tree link; |
11033 | tree formal_type = NULL; | |
11034 | tree first_parm_type; | |
5daf7c0a | 11035 | tree arg; |
a3f97cbb | 11036 | |
5daf7c0a JM |
11037 | if (TREE_CODE (function_or_method_type) == FUNCTION_DECL) |
11038 | { | |
11039 | arg = DECL_ARGUMENTS (function_or_method_type); | |
11040 | function_or_method_type = TREE_TYPE (function_or_method_type); | |
11041 | } | |
11042 | else | |
11043 | arg = NULL_TREE; | |
c26fbbca | 11044 | |
5daf7c0a | 11045 | first_parm_type = TYPE_ARG_TYPES (function_or_method_type); |
a3f97cbb | 11046 | |
556273e0 | 11047 | /* Make our first pass over the list of formal parameter types and output a |
a3f97cbb | 11048 | DW_TAG_formal_parameter DIE for each one. */ |
5daf7c0a | 11049 | for (link = first_parm_type; link; ) |
a3f97cbb | 11050 | { |
b3694847 | 11051 | dw_die_ref parm_die; |
556273e0 | 11052 | |
a3f97cbb JW |
11053 | formal_type = TREE_VALUE (link); |
11054 | if (formal_type == void_type_node) | |
11055 | break; | |
11056 | ||
11057 | /* Output a (nameless) DIE to represent the formal parameter itself. */ | |
a94dbf2c | 11058 | parm_die = gen_formal_parameter_die (formal_type, context_die); |
5daf7c0a JM |
11059 | if ((TREE_CODE (function_or_method_type) == METHOD_TYPE |
11060 | && link == first_parm_type) | |
11061 | || (arg && DECL_ARTIFICIAL (arg))) | |
a94dbf2c | 11062 | add_AT_flag (parm_die, DW_AT_artificial, 1); |
5daf7c0a JM |
11063 | |
11064 | link = TREE_CHAIN (link); | |
11065 | if (arg) | |
11066 | arg = TREE_CHAIN (arg); | |
a3f97cbb JW |
11067 | } |
11068 | ||
11069 | /* If this function type has an ellipsis, add a | |
11070 | DW_TAG_unspecified_parameters DIE to the end of the parameter list. */ | |
11071 | if (formal_type != void_type_node) | |
11072 | gen_unspecified_parameters_die (function_or_method_type, context_die); | |
11073 | ||
556273e0 | 11074 | /* Make our second (and final) pass over the list of formal parameter types |
a3f97cbb JW |
11075 | and output DIEs to represent those types (as necessary). */ |
11076 | for (link = TYPE_ARG_TYPES (function_or_method_type); | |
2ad9852d | 11077 | link && TREE_VALUE (link); |
a3f97cbb | 11078 | link = TREE_CHAIN (link)) |
2ad9852d | 11079 | gen_type_die (TREE_VALUE (link), context_die); |
a3f97cbb JW |
11080 | } |
11081 | ||
10a11b75 JM |
11082 | /* We want to generate the DIE for TYPE so that we can generate the |
11083 | die for MEMBER, which has been defined; we will need to refer back | |
11084 | to the member declaration nested within TYPE. If we're trying to | |
11085 | generate minimal debug info for TYPE, processing TYPE won't do the | |
11086 | trick; we need to attach the member declaration by hand. */ | |
11087 | ||
11088 | static void | |
7080f735 | 11089 | gen_type_die_for_member (tree type, tree member, dw_die_ref context_die) |
10a11b75 JM |
11090 | { |
11091 | gen_type_die (type, context_die); | |
11092 | ||
11093 | /* If we're trying to avoid duplicate debug info, we may not have | |
11094 | emitted the member decl for this function. Emit it now. */ | |
11095 | if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) | |
11096 | && ! lookup_decl_die (member)) | |
11097 | { | |
11098 | if (decl_ultimate_origin (member)) | |
11099 | abort (); | |
11100 | ||
11101 | push_decl_scope (type); | |
11102 | if (TREE_CODE (member) == FUNCTION_DECL) | |
11103 | gen_subprogram_die (member, lookup_type_die (type)); | |
11104 | else | |
11105 | gen_variable_die (member, lookup_type_die (type)); | |
2ad9852d | 11106 | |
10a11b75 JM |
11107 | pop_decl_scope (); |
11108 | } | |
11109 | } | |
11110 | ||
2ad9852d RK |
11111 | /* Generate the DWARF2 info for the "abstract" instance of a function which we |
11112 | may later generate inlined and/or out-of-line instances of. */ | |
10a11b75 | 11113 | |
e1772ac0 | 11114 | static void |
7080f735 | 11115 | dwarf2out_abstract_function (tree decl) |
10a11b75 | 11116 | { |
b3694847 | 11117 | dw_die_ref old_die; |
777ad4c2 | 11118 | tree save_fn; |
5daf7c0a JM |
11119 | tree context; |
11120 | int was_abstract = DECL_ABSTRACT (decl); | |
11121 | ||
11122 | /* Make sure we have the actual abstract inline, not a clone. */ | |
11123 | decl = DECL_ORIGIN (decl); | |
10a11b75 | 11124 | |
c26fbbca | 11125 | old_die = lookup_decl_die (decl); |
ae0f3477 | 11126 | if (old_die && get_AT (old_die, DW_AT_inline)) |
10a11b75 JM |
11127 | /* We've already generated the abstract instance. */ |
11128 | return; | |
11129 | ||
5daf7c0a JM |
11130 | /* Be sure we've emitted the in-class declaration DIE (if any) first, so |
11131 | we don't get confused by DECL_ABSTRACT. */ | |
8458e954 JS |
11132 | if (debug_info_level > DINFO_LEVEL_TERSE) |
11133 | { | |
11134 | context = decl_class_context (decl); | |
11135 | if (context) | |
11136 | gen_type_die_for_member | |
11137 | (context, decl, decl_function_context (decl) ? NULL : comp_unit_die); | |
11138 | } | |
c26fbbca | 11139 | |
5daf7c0a | 11140 | /* Pretend we've just finished compiling this function. */ |
777ad4c2 JM |
11141 | save_fn = current_function_decl; |
11142 | current_function_decl = decl; | |
11143 | ||
10a11b75 JM |
11144 | set_decl_abstract_flags (decl, 1); |
11145 | dwarf2out_decl (decl); | |
5daf7c0a JM |
11146 | if (! was_abstract) |
11147 | set_decl_abstract_flags (decl, 0); | |
777ad4c2 JM |
11148 | |
11149 | current_function_decl = save_fn; | |
10a11b75 JM |
11150 | } |
11151 | ||
a3f97cbb JW |
11152 | /* Generate a DIE to represent a declared function (either file-scope or |
11153 | block-local). */ | |
71dfc51f | 11154 | |
a3f97cbb | 11155 | static void |
7080f735 | 11156 | gen_subprogram_die (tree decl, dw_die_ref context_die) |
a3f97cbb JW |
11157 | { |
11158 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
b3694847 SS |
11159 | tree origin = decl_ultimate_origin (decl); |
11160 | dw_die_ref subr_die; | |
11161 | rtx fp_reg; | |
11162 | tree fn_arg_types; | |
11163 | tree outer_scope; | |
11164 | dw_die_ref old_die = lookup_decl_die (decl); | |
11165 | int declaration = (current_function_decl != decl | |
66c78aa9 | 11166 | || class_or_namespace_scope_p (context_die)); |
a3f97cbb | 11167 | |
2ad9852d RK |
11168 | /* It is possible to have both DECL_ABSTRACT and DECLARATION be true if we |
11169 | started to generate the abstract instance of an inline, decided to output | |
11170 | its containing class, and proceeded to emit the declaration of the inline | |
11171 | from the member list for the class. If so, DECLARATION takes priority; | |
11172 | we'll get back to the abstract instance when done with the class. */ | |
10a11b75 | 11173 | |
1cfdcc15 | 11174 | /* The class-scope declaration DIE must be the primary DIE. */ |
66c78aa9 | 11175 | if (origin && declaration && class_or_namespace_scope_p (context_die)) |
1cfdcc15 JM |
11176 | { |
11177 | origin = NULL; | |
11178 | if (old_die) | |
11179 | abort (); | |
11180 | } | |
11181 | ||
a3f97cbb JW |
11182 | if (origin != NULL) |
11183 | { | |
777ad4c2 | 11184 | if (declaration && ! local_scope_p (context_die)) |
10a11b75 JM |
11185 | abort (); |
11186 | ||
8d8238b6 JM |
11187 | /* Fixup die_parent for the abstract instance of a nested |
11188 | inline function. */ | |
11189 | if (old_die && old_die->die_parent == NULL) | |
11190 | add_child_die (context_die, old_die); | |
11191 | ||
54ba1f0d | 11192 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
a3f97cbb JW |
11193 | add_abstract_origin_attribute (subr_die, origin); |
11194 | } | |
bdb669cb JM |
11195 | else if (old_die) |
11196 | { | |
f31686a3 | 11197 | unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl)); |
a94dbf2c | 11198 | |
1edf43d6 JM |
11199 | if (!get_AT_flag (old_die, DW_AT_declaration) |
11200 | /* We can have a normal definition following an inline one in the | |
11201 | case of redefinition of GNU C extern inlines. | |
11202 | It seems reasonable to use AT_specification in this case. */ | |
ae0f3477 | 11203 | && !get_AT (old_die, DW_AT_inline)) |
b75ab88b NC |
11204 | { |
11205 | /* ??? This can happen if there is a bug in the program, for | |
11206 | instance, if it has duplicate function definitions. Ideally, | |
11207 | we should detect this case and ignore it. For now, if we have | |
11208 | already reported an error, any error at all, then assume that | |
4fe9b91c | 11209 | we got here because of an input error, not a dwarf2 bug. */ |
b75ab88b NC |
11210 | if (errorcount) |
11211 | return; | |
11212 | abort (); | |
11213 | } | |
4b674448 JM |
11214 | |
11215 | /* If the definition comes from the same place as the declaration, | |
a94dbf2c JM |
11216 | maybe use the old DIE. We always want the DIE for this function |
11217 | that has the *_pc attributes to be under comp_unit_die so the | |
cb9e9d8d JM |
11218 | debugger can find it. We also need to do this for abstract |
11219 | instances of inlines, since the spec requires the out-of-line copy | |
11220 | to have the same parent. For local class methods, this doesn't | |
11221 | apply; we just use the old DIE. */ | |
11222 | if ((old_die->die_parent == comp_unit_die || context_die == NULL) | |
a96c67ec JM |
11223 | && (DECL_ARTIFICIAL (decl) |
11224 | || (get_AT_unsigned (old_die, DW_AT_decl_file) == file_index | |
11225 | && (get_AT_unsigned (old_die, DW_AT_decl_line) | |
f31686a3 | 11226 | == (unsigned) DECL_SOURCE_LINE (decl))))) |
bdb669cb | 11227 | { |
4b674448 JM |
11228 | subr_die = old_die; |
11229 | ||
6097b0c3 DP |
11230 | /* Clear out the declaration attribute and the formal parameters. |
11231 | Do not remove all children, because it is possible that this | |
11232 | declaration die was forced using force_decl_die(). In such | |
11233 | cases die that forced declaration die (e.g. TAG_imported_module) | |
11234 | is one of the children that we do not want to remove. */ | |
4b674448 | 11235 | remove_AT (subr_die, DW_AT_declaration); |
6097b0c3 | 11236 | remove_child_TAG (subr_die, DW_TAG_formal_parameter); |
4b674448 JM |
11237 | } |
11238 | else | |
11239 | { | |
54ba1f0d | 11240 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
47fcfa7b | 11241 | add_AT_specification (subr_die, old_die); |
bdb669cb JM |
11242 | if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index) |
11243 | add_AT_unsigned (subr_die, DW_AT_decl_file, file_index); | |
11244 | if (get_AT_unsigned (old_die, DW_AT_decl_line) | |
f31686a3 | 11245 | != (unsigned) DECL_SOURCE_LINE (decl)) |
bdb669cb | 11246 | add_AT_unsigned |
f31686a3 | 11247 | (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl)); |
bdb669cb JM |
11248 | } |
11249 | } | |
a3f97cbb JW |
11250 | else |
11251 | { | |
54ba1f0d | 11252 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
556273e0 | 11253 | |
273dbe67 JM |
11254 | if (TREE_PUBLIC (decl)) |
11255 | add_AT_flag (subr_die, DW_AT_external, 1); | |
71dfc51f | 11256 | |
a3f97cbb | 11257 | add_name_and_src_coords_attributes (subr_die, decl); |
4927276d JM |
11258 | if (debug_info_level > DINFO_LEVEL_TERSE) |
11259 | { | |
2ad9852d RK |
11260 | add_prototyped_attribute (subr_die, TREE_TYPE (decl)); |
11261 | add_type_attribute (subr_die, TREE_TYPE (TREE_TYPE (decl)), | |
11262 | 0, 0, context_die); | |
4927276d | 11263 | } |
71dfc51f | 11264 | |
a3f97cbb | 11265 | add_pure_or_virtual_attribute (subr_die, decl); |
273dbe67 JM |
11266 | if (DECL_ARTIFICIAL (decl)) |
11267 | add_AT_flag (subr_die, DW_AT_artificial, 1); | |
2ad9852d | 11268 | |
a94dbf2c JM |
11269 | if (TREE_PROTECTED (decl)) |
11270 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected); | |
11271 | else if (TREE_PRIVATE (decl)) | |
11272 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb | 11273 | } |
4edb7b60 | 11274 | |
a94dbf2c JM |
11275 | if (declaration) |
11276 | { | |
ae0f3477 | 11277 | if (!old_die || !get_AT (old_die, DW_AT_inline)) |
1edf43d6 JM |
11278 | { |
11279 | add_AT_flag (subr_die, DW_AT_declaration, 1); | |
11280 | ||
11281 | /* The first time we see a member function, it is in the context of | |
11282 | the class to which it belongs. We make sure of this by emitting | |
11283 | the class first. The next time is the definition, which is | |
6097b0c3 DP |
11284 | handled above. The two may come from the same source text. |
11285 | ||
11286 | Note that force_decl_die() forces function declaration die. It is | |
11287 | later reused to represent definition. */ | |
1edf43d6 JM |
11288 | equate_decl_number_to_die (decl, subr_die); |
11289 | } | |
a94dbf2c JM |
11290 | } |
11291 | else if (DECL_ABSTRACT (decl)) | |
a3f97cbb | 11292 | { |
1bb17c21 | 11293 | if (DECL_DECLARED_INLINE_P (decl)) |
61b32c02 | 11294 | { |
1bb17c21 | 11295 | if (cgraph_function_possibly_inlined_p (decl)) |
61b32c02 JM |
11296 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined); |
11297 | else | |
1bb17c21 | 11298 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined); |
61b32c02 | 11299 | } |
61b32c02 | 11300 | else |
1bb17c21 JH |
11301 | { |
11302 | if (cgraph_function_possibly_inlined_p (decl)) | |
11303 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined); | |
11304 | else | |
ae0f3477 | 11305 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_not_inlined); |
1bb17c21 | 11306 | } |
61b32c02 | 11307 | |
a3f97cbb JW |
11308 | equate_decl_number_to_die (decl, subr_die); |
11309 | } | |
11310 | else if (!DECL_EXTERNAL (decl)) | |
11311 | { | |
ae0f3477 | 11312 | if (!old_die || !get_AT (old_die, DW_AT_inline)) |
ba7b35df | 11313 | equate_decl_number_to_die (decl, subr_die); |
71dfc51f | 11314 | |
5c90448c | 11315 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL, |
df696a75 | 11316 | current_function_funcdef_no); |
7d4440be | 11317 | add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id); |
5c90448c | 11318 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, |
df696a75 | 11319 | current_function_funcdef_no); |
a3f97cbb JW |
11320 | add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id); |
11321 | ||
d291dd49 JM |
11322 | add_pubname (decl, subr_die); |
11323 | add_arange (decl, subr_die); | |
11324 | ||
a3f97cbb | 11325 | #ifdef MIPS_DEBUGGING_INFO |
a3f97cbb JW |
11326 | /* Add a reference to the FDE for this routine. */ |
11327 | add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde); | |
11328 | #endif | |
11329 | ||
810429b7 | 11330 | /* Define the "frame base" location for this routine. We use the |
73c68f61 SS |
11331 | frame pointer or stack pointer registers, since the RTL for local |
11332 | variables is relative to one of them. */ | |
0a2d3d69 DB |
11333 | if (frame_base_decl && lookup_decl_loc (frame_base_decl) != NULL) |
11334 | { | |
11335 | add_location_or_const_value_attribute (subr_die, frame_base_decl, | |
11336 | DW_AT_frame_base); | |
11337 | } | |
11338 | else | |
11339 | { | |
11340 | fp_reg | |
11341 | = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx; | |
11342 | add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg)); | |
11343 | } | |
a3f97cbb | 11344 | |
6de9cd9a | 11345 | if (cfun->static_chain_decl) |
ef76d03b | 11346 | add_AT_location_description (subr_die, DW_AT_static_link, |
6de9cd9a | 11347 | loc_descriptor_from_tree (cfun->static_chain_decl, 0)); |
a3f97cbb JW |
11348 | } |
11349 | ||
11350 | /* Now output descriptions of the arguments for this function. This gets | |
556273e0 | 11351 | (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list |
a3f97cbb JW |
11352 | for a FUNCTION_DECL doesn't indicate cases where there was a trailing |
11353 | `...' at the end of the formal parameter list. In order to find out if | |
11354 | there was a trailing ellipsis or not, we must instead look at the type | |
11355 | associated with the FUNCTION_DECL. This will be a node of type | |
11356 | FUNCTION_TYPE. If the chain of type nodes hanging off of this | |
556273e0 | 11357 | FUNCTION_TYPE node ends with a void_type_node then there should *not* be |
a3f97cbb | 11358 | an ellipsis at the end. */ |
71dfc51f | 11359 | |
a3f97cbb | 11360 | /* In the case where we are describing a mere function declaration, all we |
556273e0 | 11361 | need to do here (and all we *can* do here) is to describe the *types* of |
a3f97cbb | 11362 | its formal parameters. */ |
4927276d | 11363 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 11364 | ; |
4edb7b60 | 11365 | else if (declaration) |
5daf7c0a | 11366 | gen_formal_types_die (decl, subr_die); |
a3f97cbb JW |
11367 | else |
11368 | { | |
f9da5064 | 11369 | /* Generate DIEs to represent all known formal parameters. */ |
b3694847 SS |
11370 | tree arg_decls = DECL_ARGUMENTS (decl); |
11371 | tree parm; | |
a3f97cbb JW |
11372 | |
11373 | /* When generating DIEs, generate the unspecified_parameters DIE | |
73c68f61 | 11374 | instead if we come across the arg "__builtin_va_alist" */ |
a3f97cbb | 11375 | for (parm = arg_decls; parm; parm = TREE_CHAIN (parm)) |
71dfc51f RK |
11376 | if (TREE_CODE (parm) == PARM_DECL) |
11377 | { | |
db3cf6fb MS |
11378 | if (DECL_NAME (parm) |
11379 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)), | |
11380 | "__builtin_va_alist")) | |
71dfc51f RK |
11381 | gen_unspecified_parameters_die (parm, subr_die); |
11382 | else | |
11383 | gen_decl_die (parm, subr_die); | |
11384 | } | |
a3f97cbb | 11385 | |
4fe9b91c | 11386 | /* Decide whether we need an unspecified_parameters DIE at the end. |
73c68f61 SS |
11387 | There are 2 more cases to do this for: 1) the ansi ... declaration - |
11388 | this is detectable when the end of the arg list is not a | |
11389 | void_type_node 2) an unprototyped function declaration (not a | |
11390 | definition). This just means that we have no info about the | |
11391 | parameters at all. */ | |
a3f97cbb | 11392 | fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); |
71dfc51f | 11393 | if (fn_arg_types != NULL) |
a3f97cbb | 11394 | { |
beb235f8 | 11395 | /* This is the prototyped case, check for.... */ |
a3f97cbb | 11396 | if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node) |
71dfc51f | 11397 | gen_unspecified_parameters_die (decl, subr_die); |
a3f97cbb | 11398 | } |
71dfc51f RK |
11399 | else if (DECL_INITIAL (decl) == NULL_TREE) |
11400 | gen_unspecified_parameters_die (decl, subr_die); | |
a3f97cbb JW |
11401 | } |
11402 | ||
11403 | /* Output Dwarf info for all of the stuff within the body of the function | |
11404 | (if it has one - it may be just a declaration). */ | |
11405 | outer_scope = DECL_INITIAL (decl); | |
11406 | ||
2ad9852d RK |
11407 | /* OUTER_SCOPE is a pointer to the outermost BLOCK node created to represent |
11408 | a function. This BLOCK actually represents the outermost binding contour | |
11409 | for the function, i.e. the contour in which the function's formal | |
11410 | parameters and labels get declared. Curiously, it appears that the front | |
11411 | end doesn't actually put the PARM_DECL nodes for the current function onto | |
11412 | the BLOCK_VARS list for this outer scope, but are strung off of the | |
11413 | DECL_ARGUMENTS list for the function instead. | |
11414 | ||
11415 | The BLOCK_VARS list for the `outer_scope' does provide us with a list of | |
11416 | the LABEL_DECL nodes for the function however, and we output DWARF info | |
11417 | for those in decls_for_scope. Just within the `outer_scope' there will be | |
11418 | a BLOCK node representing the function's outermost pair of curly braces, | |
11419 | and any blocks used for the base and member initializers of a C++ | |
d7248bff | 11420 | constructor function. */ |
4edb7b60 | 11421 | if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK) |
7e23cb16 | 11422 | { |
6de9cd9a DN |
11423 | /* Emit a DW_TAG_variable DIE for a named return value. */ |
11424 | if (DECL_NAME (DECL_RESULT (decl))) | |
11425 | gen_decl_die (DECL_RESULT (decl), subr_die); | |
11426 | ||
7e23cb16 JM |
11427 | current_function_has_inlines = 0; |
11428 | decls_for_scope (outer_scope, subr_die, 0); | |
71dfc51f | 11429 | |
ce61cc73 | 11430 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
7e23cb16 JM |
11431 | if (current_function_has_inlines) |
11432 | { | |
11433 | add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1); | |
11434 | if (! comp_unit_has_inlines) | |
11435 | { | |
11436 | add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1); | |
11437 | comp_unit_has_inlines = 1; | |
11438 | } | |
11439 | } | |
11440 | #endif | |
11441 | } | |
a3f97cbb JW |
11442 | } |
11443 | ||
11444 | /* Generate a DIE to represent a declared data object. */ | |
71dfc51f | 11445 | |
a3f97cbb | 11446 | static void |
7080f735 | 11447 | gen_variable_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 11448 | { |
b3694847 | 11449 | tree origin = decl_ultimate_origin (decl); |
54ba1f0d | 11450 | dw_die_ref var_die = new_die (DW_TAG_variable, context_die, decl); |
71dfc51f | 11451 | |
bdb669cb | 11452 | dw_die_ref old_die = lookup_decl_die (decl); |
9765e357 | 11453 | int declaration = (DECL_EXTERNAL (decl) |
66c78aa9 | 11454 | || class_or_namespace_scope_p (context_die)); |
4edb7b60 | 11455 | |
a3f97cbb | 11456 | if (origin != NULL) |
71dfc51f | 11457 | add_abstract_origin_attribute (var_die, origin); |
2ad9852d | 11458 | |
f76b8156 | 11459 | /* Loop unrolling can create multiple blocks that refer to the same |
2ad9852d RK |
11460 | static variable, so we must test for the DW_AT_declaration flag. |
11461 | ||
11462 | ??? Loop unrolling/reorder_blocks should perhaps be rewritten to | |
f76b8156 | 11463 | copy decls and set the DECL_ABSTRACT flag on them instead of |
2ad9852d RK |
11464 | sharing them. |
11465 | ||
11466 | ??? Duplicated blocks have been rewritten to use .debug_ranges. */ | |
f76b8156 | 11467 | else if (old_die && TREE_STATIC (decl) |
c26fbbca | 11468 | && get_AT_flag (old_die, DW_AT_declaration) == 1) |
bdb669cb | 11469 | { |
e689ae67 | 11470 | /* This is a definition of a C++ class level static. */ |
47fcfa7b | 11471 | add_AT_specification (var_die, old_die); |
bdb669cb JM |
11472 | if (DECL_NAME (decl)) |
11473 | { | |
f31686a3 | 11474 | unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl)); |
71dfc51f | 11475 | |
bdb669cb JM |
11476 | if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index) |
11477 | add_AT_unsigned (var_die, DW_AT_decl_file, file_index); | |
71dfc51f | 11478 | |
bdb669cb | 11479 | if (get_AT_unsigned (old_die, DW_AT_decl_line) |
f31686a3 | 11480 | != (unsigned) DECL_SOURCE_LINE (decl)) |
71dfc51f RK |
11481 | |
11482 | add_AT_unsigned (var_die, DW_AT_decl_line, | |
f31686a3 | 11483 | DECL_SOURCE_LINE (decl)); |
bdb669cb JM |
11484 | } |
11485 | } | |
a3f97cbb JW |
11486 | else |
11487 | { | |
11488 | add_name_and_src_coords_attributes (var_die, decl); | |
2ad9852d | 11489 | add_type_attribute (var_die, TREE_TYPE (decl), TREE_READONLY (decl), |
a3f97cbb | 11490 | TREE_THIS_VOLATILE (decl), context_die); |
71dfc51f | 11491 | |
273dbe67 JM |
11492 | if (TREE_PUBLIC (decl)) |
11493 | add_AT_flag (var_die, DW_AT_external, 1); | |
71dfc51f | 11494 | |
273dbe67 JM |
11495 | if (DECL_ARTIFICIAL (decl)) |
11496 | add_AT_flag (var_die, DW_AT_artificial, 1); | |
71dfc51f | 11497 | |
a94dbf2c JM |
11498 | if (TREE_PROTECTED (decl)) |
11499 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected); | |
11500 | else if (TREE_PRIVATE (decl)) | |
11501 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb | 11502 | } |
4edb7b60 JM |
11503 | |
11504 | if (declaration) | |
11505 | add_AT_flag (var_die, DW_AT_declaration, 1); | |
556273e0 | 11506 | |
6097b0c3 | 11507 | if (DECL_ABSTRACT (decl) || declaration) |
4edb7b60 JM |
11508 | equate_decl_number_to_die (decl, var_die); |
11509 | ||
11510 | if (! declaration && ! DECL_ABSTRACT (decl)) | |
a3f97cbb | 11511 | { |
0a2d3d69 | 11512 | add_location_or_const_value_attribute (var_die, decl, DW_AT_location); |
d291dd49 | 11513 | add_pubname (decl, var_die); |
a3f97cbb | 11514 | } |
1bfb5f8f JM |
11515 | else |
11516 | tree_add_const_value_attribute (var_die, decl); | |
a3f97cbb JW |
11517 | } |
11518 | ||
11519 | /* Generate a DIE to represent a label identifier. */ | |
71dfc51f | 11520 | |
a3f97cbb | 11521 | static void |
7080f735 | 11522 | gen_label_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 11523 | { |
b3694847 | 11524 | tree origin = decl_ultimate_origin (decl); |
54ba1f0d | 11525 | dw_die_ref lbl_die = new_die (DW_TAG_label, context_die, decl); |
b3694847 | 11526 | rtx insn; |
a3f97cbb | 11527 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
71dfc51f | 11528 | |
a3f97cbb | 11529 | if (origin != NULL) |
71dfc51f | 11530 | add_abstract_origin_attribute (lbl_die, origin); |
a3f97cbb | 11531 | else |
71dfc51f RK |
11532 | add_name_and_src_coords_attributes (lbl_die, decl); |
11533 | ||
a3f97cbb | 11534 | if (DECL_ABSTRACT (decl)) |
71dfc51f | 11535 | equate_decl_number_to_die (decl, lbl_die); |
a3f97cbb JW |
11536 | else |
11537 | { | |
d0585b99 | 11538 | insn = DECL_RTL_IF_SET (decl); |
088e7160 NC |
11539 | |
11540 | /* Deleted labels are programmer specified labels which have been | |
6356f892 | 11541 | eliminated because of various optimizations. We still emit them |
088e7160 | 11542 | here so that it is possible to put breakpoints on them. */ |
d0585b99 RH |
11543 | if (insn |
11544 | && (GET_CODE (insn) == CODE_LABEL | |
11545 | || ((GET_CODE (insn) == NOTE | |
11546 | && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))) | |
a3f97cbb | 11547 | { |
556273e0 KH |
11548 | /* When optimization is enabled (via -O) some parts of the compiler |
11549 | (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which | |
a3f97cbb JW |
11550 | represent source-level labels which were explicitly declared by |
11551 | the user. This really shouldn't be happening though, so catch | |
11552 | it if it ever does happen. */ | |
11553 | if (INSN_DELETED_P (insn)) | |
71dfc51f RK |
11554 | abort (); |
11555 | ||
66234570 | 11556 | ASM_GENERATE_INTERNAL_LABEL (label, "L", CODE_LABEL_NUMBER (insn)); |
a3f97cbb JW |
11557 | add_AT_lbl_id (lbl_die, DW_AT_low_pc, label); |
11558 | } | |
11559 | } | |
11560 | } | |
11561 | ||
11562 | /* Generate a DIE for a lexical block. */ | |
71dfc51f | 11563 | |
a3f97cbb | 11564 | static void |
7080f735 | 11565 | gen_lexical_block_die (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 11566 | { |
54ba1f0d | 11567 | dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die, stmt); |
a3f97cbb | 11568 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
71dfc51f RK |
11569 | |
11570 | if (! BLOCK_ABSTRACT (stmt)) | |
a3f97cbb | 11571 | { |
a20612aa RH |
11572 | if (BLOCK_FRAGMENT_CHAIN (stmt)) |
11573 | { | |
11574 | tree chain; | |
11575 | ||
2bee6045 | 11576 | add_AT_range_list (stmt_die, DW_AT_ranges, add_ranges (stmt)); |
a20612aa RH |
11577 | |
11578 | chain = BLOCK_FRAGMENT_CHAIN (stmt); | |
11579 | do | |
11580 | { | |
11581 | add_ranges (chain); | |
11582 | chain = BLOCK_FRAGMENT_CHAIN (chain); | |
11583 | } | |
11584 | while (chain); | |
11585 | add_ranges (NULL); | |
11586 | } | |
11587 | else | |
11588 | { | |
11589 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, | |
11590 | BLOCK_NUMBER (stmt)); | |
11591 | add_AT_lbl_id (stmt_die, DW_AT_low_pc, label); | |
11592 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, | |
11593 | BLOCK_NUMBER (stmt)); | |
11594 | add_AT_lbl_id (stmt_die, DW_AT_high_pc, label); | |
11595 | } | |
a3f97cbb | 11596 | } |
71dfc51f | 11597 | |
d7248bff | 11598 | decls_for_scope (stmt, stmt_die, depth); |
a3f97cbb JW |
11599 | } |
11600 | ||
11601 | /* Generate a DIE for an inlined subprogram. */ | |
71dfc51f | 11602 | |
a3f97cbb | 11603 | static void |
7080f735 | 11604 | gen_inlined_subroutine_die (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 11605 | { |
9bdca184 AO |
11606 | tree decl = block_ultimate_origin (stmt); |
11607 | ||
11608 | /* Emit info for the abstract instance first, if we haven't yet. We | |
11609 | must emit this even if the block is abstract, otherwise when we | |
11610 | emit the block below (or elsewhere), we may end up trying to emit | |
11611 | a die whose origin die hasn't been emitted, and crashing. */ | |
11612 | dwarf2out_abstract_function (decl); | |
11613 | ||
71dfc51f | 11614 | if (! BLOCK_ABSTRACT (stmt)) |
a3f97cbb | 11615 | { |
b3694847 | 11616 | dw_die_ref subr_die |
54ba1f0d | 11617 | = new_die (DW_TAG_inlined_subroutine, context_die, stmt); |
d7248bff | 11618 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
71dfc51f | 11619 | |
ab72d377 | 11620 | add_abstract_origin_attribute (subr_die, decl); |
5c90448c | 11621 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, |
18c038b9 | 11622 | BLOCK_NUMBER (stmt)); |
a3f97cbb | 11623 | add_AT_lbl_id (subr_die, DW_AT_low_pc, label); |
18c038b9 MM |
11624 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, |
11625 | BLOCK_NUMBER (stmt)); | |
a3f97cbb | 11626 | add_AT_lbl_id (subr_die, DW_AT_high_pc, label); |
d7248bff | 11627 | decls_for_scope (stmt, subr_die, depth); |
7e23cb16 | 11628 | current_function_has_inlines = 1; |
a3f97cbb | 11629 | } |
06e224f7 AO |
11630 | else |
11631 | /* We may get here if we're the outer block of function A that was | |
11632 | inlined into function B that was inlined into function C. When | |
11633 | generating debugging info for C, dwarf2out_abstract_function(B) | |
11634 | would mark all inlined blocks as abstract, including this one. | |
11635 | So, we wouldn't (and shouldn't) expect labels to be generated | |
11636 | for this one. Instead, just emit debugging info for | |
11637 | declarations within the block. This is particularly important | |
11638 | in the case of initializers of arguments passed from B to us: | |
11639 | if they're statement expressions containing declarations, we | |
11640 | wouldn't generate dies for their abstract variables, and then, | |
11641 | when generating dies for the real variables, we'd die (pun | |
11642 | intended :-) */ | |
11643 | gen_lexical_block_die (stmt, context_die, depth); | |
a3f97cbb JW |
11644 | } |
11645 | ||
11646 | /* Generate a DIE for a field in a record, or structure. */ | |
71dfc51f | 11647 | |
a3f97cbb | 11648 | static void |
7080f735 | 11649 | gen_field_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 11650 | { |
a53efda2 | 11651 | dw_die_ref decl_die; |
71dfc51f | 11652 | |
a53efda2 JZ |
11653 | if (TREE_TYPE (decl) == error_mark_node) |
11654 | return; | |
7080f735 | 11655 | |
a53efda2 | 11656 | decl_die = new_die (DW_TAG_member, context_die, decl); |
a3f97cbb | 11657 | add_name_and_src_coords_attributes (decl_die, decl); |
a3f97cbb JW |
11658 | add_type_attribute (decl_die, member_declared_type (decl), |
11659 | TREE_READONLY (decl), TREE_THIS_VOLATILE (decl), | |
11660 | context_die); | |
71dfc51f | 11661 | |
a3f97cbb JW |
11662 | if (DECL_BIT_FIELD_TYPE (decl)) |
11663 | { | |
11664 | add_byte_size_attribute (decl_die, decl); | |
11665 | add_bit_size_attribute (decl_die, decl); | |
11666 | add_bit_offset_attribute (decl_die, decl); | |
11667 | } | |
71dfc51f | 11668 | |
a94dbf2c JM |
11669 | if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE) |
11670 | add_data_member_location_attribute (decl_die, decl); | |
71dfc51f | 11671 | |
273dbe67 JM |
11672 | if (DECL_ARTIFICIAL (decl)) |
11673 | add_AT_flag (decl_die, DW_AT_artificial, 1); | |
71dfc51f | 11674 | |
a94dbf2c JM |
11675 | if (TREE_PROTECTED (decl)) |
11676 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected); | |
11677 | else if (TREE_PRIVATE (decl)) | |
11678 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb JW |
11679 | } |
11680 | ||
ab72d377 JM |
11681 | #if 0 |
11682 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. | |
11683 | Use modified_type_die instead. | |
a3f97cbb JW |
11684 | We keep this code here just in case these types of DIEs may be needed to |
11685 | represent certain things in other languages (e.g. Pascal) someday. */ | |
2ad9852d | 11686 | |
a3f97cbb | 11687 | static void |
7080f735 | 11688 | gen_pointer_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11689 | { |
b3694847 | 11690 | dw_die_ref ptr_die |
54ba1f0d | 11691 | = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die), type); |
71dfc51f | 11692 | |
a3f97cbb | 11693 | equate_type_number_to_die (type, ptr_die); |
a3f97cbb | 11694 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
ab72d377 | 11695 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
a3f97cbb JW |
11696 | } |
11697 | ||
ab72d377 JM |
11698 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. |
11699 | Use modified_type_die instead. | |
a3f97cbb JW |
11700 | We keep this code here just in case these types of DIEs may be needed to |
11701 | represent certain things in other languages (e.g. Pascal) someday. */ | |
2ad9852d | 11702 | |
a3f97cbb | 11703 | static void |
7080f735 | 11704 | gen_reference_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11705 | { |
b3694847 | 11706 | dw_die_ref ref_die |
54ba1f0d | 11707 | = new_die (DW_TAG_reference_type, scope_die_for (type, context_die), type); |
71dfc51f | 11708 | |
a3f97cbb | 11709 | equate_type_number_to_die (type, ref_die); |
a3f97cbb | 11710 | add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die); |
ab72d377 | 11711 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
a3f97cbb | 11712 | } |
ab72d377 | 11713 | #endif |
a3f97cbb JW |
11714 | |
11715 | /* Generate a DIE for a pointer to a member type. */ | |
2ad9852d | 11716 | |
a3f97cbb | 11717 | static void |
7080f735 | 11718 | gen_ptr_to_mbr_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11719 | { |
b3694847 | 11720 | dw_die_ref ptr_die |
54ba1f0d RH |
11721 | = new_die (DW_TAG_ptr_to_member_type, |
11722 | scope_die_for (type, context_die), type); | |
71dfc51f | 11723 | |
a3f97cbb | 11724 | equate_type_number_to_die (type, ptr_die); |
a3f97cbb | 11725 | add_AT_die_ref (ptr_die, DW_AT_containing_type, |
bdb669cb | 11726 | lookup_type_die (TYPE_OFFSET_BASETYPE (type))); |
a3f97cbb JW |
11727 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
11728 | } | |
11729 | ||
11730 | /* Generate the DIE for the compilation unit. */ | |
71dfc51f | 11731 | |
a96c67ec | 11732 | static dw_die_ref |
7080f735 | 11733 | gen_compile_unit_die (const char *filename) |
a3f97cbb | 11734 | { |
b3694847 | 11735 | dw_die_ref die; |
a3f97cbb | 11736 | char producer[250]; |
3ac88239 | 11737 | const char *language_string = lang_hooks.name; |
a96c67ec | 11738 | int language; |
a3f97cbb | 11739 | |
54ba1f0d | 11740 | die = new_die (DW_TAG_compile_unit, NULL, NULL); |
bdb669cb | 11741 | |
c4274b22 RH |
11742 | if (filename) |
11743 | { | |
11744 | add_name_attribute (die, filename); | |
e3091a5f R |
11745 | /* Don't add cwd for <built-in>. */ |
11746 | if (filename[0] != DIR_SEPARATOR && filename[0] != '<') | |
c4274b22 RH |
11747 | add_comp_dir_attribute (die); |
11748 | } | |
a3f97cbb JW |
11749 | |
11750 | sprintf (producer, "%s %s", language_string, version_string); | |
11751 | ||
11752 | #ifdef MIPS_DEBUGGING_INFO | |
11753 | /* The MIPS/SGI compilers place the 'cc' command line options in the producer | |
11754 | string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do | |
11755 | not appear in the producer string, the debugger reaches the conclusion | |
11756 | that the object file is stripped and has no debugging information. | |
11757 | To get the MIPS/SGI debugger to believe that there is debugging | |
11758 | information in the object file, we add a -g to the producer string. */ | |
4927276d JM |
11759 | if (debug_info_level > DINFO_LEVEL_TERSE) |
11760 | strcat (producer, " -g"); | |
a3f97cbb JW |
11761 | #endif |
11762 | ||
a96c67ec | 11763 | add_AT_string (die, DW_AT_producer, producer); |
a9d38797 | 11764 | |
a3f97cbb | 11765 | if (strcmp (language_string, "GNU C++") == 0) |
a96c67ec | 11766 | language = DW_LANG_C_plus_plus; |
a3f97cbb | 11767 | else if (strcmp (language_string, "GNU Ada") == 0) |
8cb5fbbf | 11768 | language = DW_LANG_Ada95; |
a9d38797 | 11769 | else if (strcmp (language_string, "GNU F77") == 0) |
a96c67ec | 11770 | language = DW_LANG_Fortran77; |
6de9cd9a DN |
11771 | else if (strcmp (language_string, "GNU F95") == 0) |
11772 | language = DW_LANG_Fortran95; | |
bc28c45b | 11773 | else if (strcmp (language_string, "GNU Pascal") == 0) |
a96c67ec | 11774 | language = DW_LANG_Pascal83; |
28985b81 AG |
11775 | else if (strcmp (language_string, "GNU Java") == 0) |
11776 | language = DW_LANG_Java; | |
a3f97cbb | 11777 | else |
a96c67ec | 11778 | language = DW_LANG_C89; |
a9d38797 | 11779 | |
a96c67ec | 11780 | add_AT_unsigned (die, DW_AT_language, language); |
a96c67ec | 11781 | return die; |
a3f97cbb JW |
11782 | } |
11783 | ||
11784 | /* Generate a DIE for a string type. */ | |
71dfc51f | 11785 | |
a3f97cbb | 11786 | static void |
7080f735 | 11787 | gen_string_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11788 | { |
b3694847 | 11789 | dw_die_ref type_die |
54ba1f0d | 11790 | = new_die (DW_TAG_string_type, scope_die_for (type, context_die), type); |
71dfc51f | 11791 | |
bdb669cb | 11792 | equate_type_number_to_die (type, type_die); |
a3f97cbb | 11793 | |
2ad9852d RK |
11794 | /* ??? Fudge the string length attribute for now. |
11795 | TODO: add string length info. */ | |
11796 | #if 0 | |
11797 | string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type))); | |
11798 | bound_representation (upper_bound, 0, 'u'); | |
11799 | #endif | |
a3f97cbb JW |
11800 | } |
11801 | ||
61b32c02 | 11802 | /* Generate the DIE for a base class. */ |
71dfc51f | 11803 | |
61b32c02 | 11804 | static void |
7080f735 | 11805 | gen_inheritance_die (tree binfo, tree access, dw_die_ref context_die) |
61b32c02 | 11806 | { |
54ba1f0d | 11807 | dw_die_ref die = new_die (DW_TAG_inheritance, context_die, binfo); |
71dfc51f | 11808 | |
61b32c02 JM |
11809 | add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die); |
11810 | add_data_member_location_attribute (die, binfo); | |
71dfc51f | 11811 | |
61b32c02 JM |
11812 | if (TREE_VIA_VIRTUAL (binfo)) |
11813 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); | |
2ad9852d | 11814 | |
dbbf88d1 | 11815 | if (access == access_public_node) |
61b32c02 | 11816 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public); |
dbbf88d1 | 11817 | else if (access == access_protected_node) |
61b32c02 JM |
11818 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected); |
11819 | } | |
11820 | ||
956d6950 | 11821 | /* Generate a DIE for a class member. */ |
71dfc51f | 11822 | |
a3f97cbb | 11823 | static void |
7080f735 | 11824 | gen_member_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11825 | { |
b3694847 | 11826 | tree member; |
dbbf88d1 | 11827 | tree binfo = TYPE_BINFO (type); |
10a11b75 | 11828 | dw_die_ref child; |
71dfc51f | 11829 | |
a3f97cbb JW |
11830 | /* If this is not an incomplete type, output descriptions of each of its |
11831 | members. Note that as we output the DIEs necessary to represent the | |
11832 | members of this record or union type, we will also be trying to output | |
11833 | DIEs to represent the *types* of those members. However the `type' | |
556273e0 | 11834 | function (above) will specifically avoid generating type DIEs for member |
eaec9b3d | 11835 | types *within* the list of member DIEs for this (containing) type except |
a3f97cbb JW |
11836 | for those types (of members) which are explicitly marked as also being |
11837 | members of this (containing) type themselves. The g++ front- end can | |
2ad9852d RK |
11838 | force any given type to be treated as a member of some other (containing) |
11839 | type by setting the TYPE_CONTEXT of the given (member) type to point to | |
11840 | the TREE node representing the appropriate (containing) type. */ | |
a3f97cbb | 11841 | |
61b32c02 | 11842 | /* First output info about the base classes. */ |
dbbf88d1 | 11843 | if (binfo && BINFO_BASETYPES (binfo)) |
a3f97cbb | 11844 | { |
dbbf88d1 NS |
11845 | tree bases = BINFO_BASETYPES (binfo); |
11846 | tree accesses = BINFO_BASEACCESSES (binfo); | |
b3694847 SS |
11847 | int n_bases = TREE_VEC_LENGTH (bases); |
11848 | int i; | |
61b32c02 JM |
11849 | |
11850 | for (i = 0; i < n_bases; i++) | |
dbbf88d1 NS |
11851 | gen_inheritance_die (TREE_VEC_ELT (bases, i), |
11852 | (accesses ? TREE_VEC_ELT (accesses, i) | |
11853 | : access_public_node), context_die); | |
a3f97cbb JW |
11854 | } |
11855 | ||
61b32c02 JM |
11856 | /* Now output info about the data members and type members. */ |
11857 | for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) | |
10a11b75 JM |
11858 | { |
11859 | /* If we thought we were generating minimal debug info for TYPE | |
11860 | and then changed our minds, some of the member declarations | |
11861 | may have already been defined. Don't define them again, but | |
11862 | do put them in the right order. */ | |
11863 | ||
11864 | child = lookup_decl_die (member); | |
11865 | if (child) | |
11866 | splice_child_die (context_die, child); | |
11867 | else | |
11868 | gen_decl_die (member, context_die); | |
11869 | } | |
61b32c02 | 11870 | |
a3f97cbb | 11871 | /* Now output info about the function members (if any). */ |
61b32c02 | 11872 | for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member)) |
10a11b75 | 11873 | { |
5daf7c0a JM |
11874 | /* Don't include clones in the member list. */ |
11875 | if (DECL_ABSTRACT_ORIGIN (member)) | |
11876 | continue; | |
11877 | ||
10a11b75 JM |
11878 | child = lookup_decl_die (member); |
11879 | if (child) | |
11880 | splice_child_die (context_die, child); | |
11881 | else | |
11882 | gen_decl_die (member, context_die); | |
11883 | } | |
a3f97cbb JW |
11884 | } |
11885 | ||
10a11b75 JM |
11886 | /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG |
11887 | is set, we pretend that the type was never defined, so we only get the | |
11888 | member DIEs needed by later specification DIEs. */ | |
71dfc51f | 11889 | |
a3f97cbb | 11890 | static void |
7080f735 | 11891 | gen_struct_or_union_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11892 | { |
b3694847 SS |
11893 | dw_die_ref type_die = lookup_type_die (type); |
11894 | dw_die_ref scope_die = 0; | |
11895 | int nested = 0; | |
10a11b75 | 11896 | int complete = (TYPE_SIZE (type) |
65e1263a JW |
11897 | && (! TYPE_STUB_DECL (type) |
11898 | || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)))); | |
66c78aa9 | 11899 | int ns_decl = (context_die && context_die->die_tag == DW_TAG_namespace); |
273dbe67 | 11900 | |
10a11b75 | 11901 | if (type_die && ! complete) |
273dbe67 | 11902 | return; |
a082c85a | 11903 | |
71dfc51f | 11904 | if (TYPE_CONTEXT (type) != NULL_TREE |
66c78aa9 JM |
11905 | && (AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
11906 | || TREE_CODE (TYPE_CONTEXT (type)) == NAMESPACE_DECL)) | |
a082c85a JM |
11907 | nested = 1; |
11908 | ||
a94dbf2c | 11909 | scope_die = scope_die_for (type, context_die); |
a082c85a JM |
11910 | |
11911 | if (! type_die || (nested && scope_die == comp_unit_die)) | |
273dbe67 | 11912 | /* First occurrence of type or toplevel definition of nested class. */ |
a3f97cbb | 11913 | { |
b3694847 | 11914 | dw_die_ref old_die = type_die; |
71dfc51f | 11915 | |
a3f97cbb JW |
11916 | type_die = new_die (TREE_CODE (type) == RECORD_TYPE |
11917 | ? DW_TAG_structure_type : DW_TAG_union_type, | |
54ba1f0d | 11918 | scope_die, type); |
a3f97cbb | 11919 | equate_type_number_to_die (type, type_die); |
273dbe67 | 11920 | if (old_die) |
47fcfa7b | 11921 | add_AT_specification (type_die, old_die); |
5de0e8d4 JM |
11922 | else |
11923 | add_name_attribute (type_die, type_tag (type)); | |
a3f97cbb | 11924 | } |
4b674448 | 11925 | else |
273dbe67 | 11926 | remove_AT (type_die, DW_AT_declaration); |
a3f97cbb JW |
11927 | |
11928 | /* If this type has been completed, then give it a byte_size attribute and | |
11929 | then give a list of members. */ | |
66c78aa9 | 11930 | if (complete && !ns_decl) |
a3f97cbb | 11931 | { |
556273e0 | 11932 | /* Prevent infinite recursion in cases where the type of some member of |
73c68f61 | 11933 | this type is expressed in terms of this type itself. */ |
a3f97cbb | 11934 | TREE_ASM_WRITTEN (type) = 1; |
273dbe67 | 11935 | add_byte_size_attribute (type_die, type); |
e9a25f70 | 11936 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
b2932ae5 | 11937 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
71dfc51f | 11938 | |
ef76d03b JW |
11939 | /* If the first reference to this type was as the return type of an |
11940 | inline function, then it may not have a parent. Fix this now. */ | |
11941 | if (type_die->die_parent == NULL) | |
11942 | add_child_die (scope_die, type_die); | |
11943 | ||
273dbe67 JM |
11944 | push_decl_scope (type); |
11945 | gen_member_die (type, type_die); | |
11946 | pop_decl_scope (); | |
71dfc51f | 11947 | |
a94dbf2c JM |
11948 | /* GNU extension: Record what type our vtable lives in. */ |
11949 | if (TYPE_VFIELD (type)) | |
11950 | { | |
11951 | tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type)); | |
71dfc51f | 11952 | |
de6e505e JM |
11953 | gen_type_die (vtype, context_die); |
11954 | add_AT_die_ref (type_die, DW_AT_containing_type, | |
11955 | lookup_type_die (vtype)); | |
a94dbf2c | 11956 | } |
a3f97cbb | 11957 | } |
4b674448 | 11958 | else |
8a8c3656 JM |
11959 | { |
11960 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
a30d4514 | 11961 | |
9765e357 | 11962 | /* We don't need to do this for function-local types. */ |
9702143f RK |
11963 | if (TYPE_STUB_DECL (type) |
11964 | && ! decl_function_context (TYPE_STUB_DECL (type))) | |
2ad9852d | 11965 | VARRAY_PUSH_TREE (incomplete_types, type); |
8a8c3656 | 11966 | } |
a3f97cbb JW |
11967 | } |
11968 | ||
11969 | /* Generate a DIE for a subroutine _type_. */ | |
71dfc51f | 11970 | |
a3f97cbb | 11971 | static void |
7080f735 | 11972 | gen_subroutine_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11973 | { |
b3694847 SS |
11974 | tree return_type = TREE_TYPE (type); |
11975 | dw_die_ref subr_die | |
54ba1f0d RH |
11976 | = new_die (DW_TAG_subroutine_type, |
11977 | scope_die_for (type, context_die), type); | |
71dfc51f | 11978 | |
a3f97cbb JW |
11979 | equate_type_number_to_die (type, subr_die); |
11980 | add_prototyped_attribute (subr_die, type); | |
a3f97cbb | 11981 | add_type_attribute (subr_die, return_type, 0, 0, context_die); |
a94dbf2c | 11982 | gen_formal_types_die (type, subr_die); |
a3f97cbb JW |
11983 | } |
11984 | ||
f9da5064 | 11985 | /* Generate a DIE for a type definition. */ |
71dfc51f | 11986 | |
a3f97cbb | 11987 | static void |
7080f735 | 11988 | gen_typedef_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 11989 | { |
b3694847 SS |
11990 | dw_die_ref type_die; |
11991 | tree origin; | |
a94dbf2c JM |
11992 | |
11993 | if (TREE_ASM_WRITTEN (decl)) | |
11994 | return; | |
a94dbf2c | 11995 | |
2ad9852d | 11996 | TREE_ASM_WRITTEN (decl) = 1; |
54ba1f0d | 11997 | type_die = new_die (DW_TAG_typedef, context_die, decl); |
a94dbf2c | 11998 | origin = decl_ultimate_origin (decl); |
a3f97cbb | 11999 | if (origin != NULL) |
a94dbf2c | 12000 | add_abstract_origin_attribute (type_die, origin); |
a3f97cbb JW |
12001 | else |
12002 | { | |
b3694847 | 12003 | tree type; |
2ad9852d | 12004 | |
a3f97cbb | 12005 | add_name_and_src_coords_attributes (type_die, decl); |
a94dbf2c JM |
12006 | if (DECL_ORIGINAL_TYPE (decl)) |
12007 | { | |
12008 | type = DECL_ORIGINAL_TYPE (decl); | |
62e3bf54 JM |
12009 | |
12010 | if (type == TREE_TYPE (decl)) | |
12011 | abort (); | |
12012 | else | |
12013 | equate_type_number_to_die (TREE_TYPE (decl), type_die); | |
a94dbf2c JM |
12014 | } |
12015 | else | |
12016 | type = TREE_TYPE (decl); | |
2ad9852d | 12017 | |
a94dbf2c JM |
12018 | add_type_attribute (type_die, type, TREE_READONLY (decl), |
12019 | TREE_THIS_VOLATILE (decl), context_die); | |
a3f97cbb | 12020 | } |
71dfc51f | 12021 | |
a3f97cbb | 12022 | if (DECL_ABSTRACT (decl)) |
a94dbf2c | 12023 | equate_decl_number_to_die (decl, type_die); |
a3f97cbb JW |
12024 | } |
12025 | ||
12026 | /* Generate a type description DIE. */ | |
71dfc51f | 12027 | |
a3f97cbb | 12028 | static void |
7080f735 | 12029 | gen_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12030 | { |
348bb3c7 JM |
12031 | int need_pop; |
12032 | ||
71dfc51f RK |
12033 | if (type == NULL_TREE || type == error_mark_node) |
12034 | return; | |
a3f97cbb | 12035 | |
a94dbf2c JM |
12036 | if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
12037 | && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) | |
556273e0 | 12038 | { |
5d7bed9d DJ |
12039 | if (TREE_ASM_WRITTEN (type)) |
12040 | return; | |
12041 | ||
29b91443 JM |
12042 | /* Prevent broken recursion; we can't hand off to the same type. */ |
12043 | if (DECL_ORIGINAL_TYPE (TYPE_NAME (type)) == type) | |
12044 | abort (); | |
12045 | ||
a94dbf2c JM |
12046 | TREE_ASM_WRITTEN (type) = 1; |
12047 | gen_decl_die (TYPE_NAME (type), context_die); | |
12048 | return; | |
12049 | } | |
12050 | ||
5d7bed9d DJ |
12051 | /* We are going to output a DIE to represent the unqualified version |
12052 | of this type (i.e. without any const or volatile qualifiers) so | |
12053 | get the main variant (i.e. the unqualified version) of this type | |
12054 | now. (Vectors are special because the debugging info is in the | |
12055 | cloned type itself). */ | |
12056 | if (TREE_CODE (type) != VECTOR_TYPE) | |
12057 | type = type_main_variant (type); | |
12058 | ||
12059 | if (TREE_ASM_WRITTEN (type)) | |
12060 | return; | |
12061 | ||
a3f97cbb JW |
12062 | switch (TREE_CODE (type)) |
12063 | { | |
12064 | case ERROR_MARK: | |
12065 | break; | |
12066 | ||
12067 | case POINTER_TYPE: | |
12068 | case REFERENCE_TYPE: | |
956d6950 JL |
12069 | /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This |
12070 | ensures that the gen_type_die recursion will terminate even if the | |
12071 | type is recursive. Recursive types are possible in Ada. */ | |
12072 | /* ??? We could perhaps do this for all types before the switch | |
12073 | statement. */ | |
12074 | TREE_ASM_WRITTEN (type) = 1; | |
12075 | ||
a3f97cbb | 12076 | /* For these types, all that is required is that we output a DIE (or a |
73c68f61 | 12077 | set of DIEs) to represent the "basis" type. */ |
a3f97cbb JW |
12078 | gen_type_die (TREE_TYPE (type), context_die); |
12079 | break; | |
12080 | ||
12081 | case OFFSET_TYPE: | |
556273e0 | 12082 | /* This code is used for C++ pointer-to-data-member types. |
71dfc51f | 12083 | Output a description of the relevant class type. */ |
a3f97cbb | 12084 | gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die); |
71dfc51f | 12085 | |
a3f97cbb JW |
12086 | /* Output a description of the type of the object pointed to. */ |
12087 | gen_type_die (TREE_TYPE (type), context_die); | |
71dfc51f | 12088 | |
a3f97cbb | 12089 | /* Now output a DIE to represent this pointer-to-data-member type |
73c68f61 | 12090 | itself. */ |
a3f97cbb JW |
12091 | gen_ptr_to_mbr_type_die (type, context_die); |
12092 | break; | |
12093 | ||
12094 | case SET_TYPE: | |
12095 | gen_type_die (TYPE_DOMAIN (type), context_die); | |
12096 | gen_set_type_die (type, context_die); | |
12097 | break; | |
12098 | ||
12099 | case FILE_TYPE: | |
12100 | gen_type_die (TREE_TYPE (type), context_die); | |
12101 | abort (); /* No way to represent these in Dwarf yet! */ | |
12102 | break; | |
12103 | ||
12104 | case FUNCTION_TYPE: | |
12105 | /* Force out return type (in case it wasn't forced out already). */ | |
12106 | gen_type_die (TREE_TYPE (type), context_die); | |
12107 | gen_subroutine_type_die (type, context_die); | |
12108 | break; | |
12109 | ||
12110 | case METHOD_TYPE: | |
12111 | /* Force out return type (in case it wasn't forced out already). */ | |
12112 | gen_type_die (TREE_TYPE (type), context_die); | |
12113 | gen_subroutine_type_die (type, context_die); | |
12114 | break; | |
12115 | ||
12116 | case ARRAY_TYPE: | |
12117 | if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE) | |
12118 | { | |
12119 | gen_type_die (TREE_TYPE (type), context_die); | |
12120 | gen_string_type_die (type, context_die); | |
12121 | } | |
12122 | else | |
71dfc51f | 12123 | gen_array_type_die (type, context_die); |
a3f97cbb JW |
12124 | break; |
12125 | ||
4061f623 | 12126 | case VECTOR_TYPE: |
84f0ace0 | 12127 | gen_array_type_die (type, context_die); |
4061f623 BS |
12128 | break; |
12129 | ||
a3f97cbb JW |
12130 | case ENUMERAL_TYPE: |
12131 | case RECORD_TYPE: | |
12132 | case UNION_TYPE: | |
12133 | case QUAL_UNION_TYPE: | |
2ad9852d | 12134 | /* If this is a nested type whose containing class hasn't been written |
73c68f61 SS |
12135 | out yet, writing it out will cover this one, too. This does not apply |
12136 | to instantiations of member class templates; they need to be added to | |
12137 | the containing class as they are generated. FIXME: This hurts the | |
12138 | idea of combining type decls from multiple TUs, since we can't predict | |
12139 | what set of template instantiations we'll get. */ | |
a082c85a | 12140 | if (TYPE_CONTEXT (type) |
5f2f160c | 12141 | && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
a082c85a | 12142 | && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type))) |
a94dbf2c JM |
12143 | { |
12144 | gen_type_die (TYPE_CONTEXT (type), context_die); | |
12145 | ||
348bb3c7 | 12146 | if (TREE_ASM_WRITTEN (type)) |
a94dbf2c JM |
12147 | return; |
12148 | ||
12149 | /* If that failed, attach ourselves to the stub. */ | |
12150 | push_decl_scope (TYPE_CONTEXT (type)); | |
12151 | context_die = lookup_type_die (TYPE_CONTEXT (type)); | |
348bb3c7 | 12152 | need_pop = 1; |
a94dbf2c | 12153 | } |
348bb3c7 | 12154 | else |
66c78aa9 JM |
12155 | { |
12156 | declare_in_namespace (type, context_die); | |
12157 | need_pop = 0; | |
12158 | } | |
a94dbf2c JM |
12159 | |
12160 | if (TREE_CODE (type) == ENUMERAL_TYPE) | |
273dbe67 | 12161 | gen_enumeration_type_die (type, context_die); |
a3f97cbb | 12162 | else |
273dbe67 | 12163 | gen_struct_or_union_type_die (type, context_die); |
4b674448 | 12164 | |
348bb3c7 | 12165 | if (need_pop) |
a94dbf2c JM |
12166 | pop_decl_scope (); |
12167 | ||
4b674448 | 12168 | /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix |
a082c85a JM |
12169 | it up if it is ever completed. gen_*_type_die will set it for us |
12170 | when appropriate. */ | |
12171 | return; | |
a3f97cbb JW |
12172 | |
12173 | case VOID_TYPE: | |
12174 | case INTEGER_TYPE: | |
12175 | case REAL_TYPE: | |
12176 | case COMPLEX_TYPE: | |
12177 | case BOOLEAN_TYPE: | |
12178 | case CHAR_TYPE: | |
12179 | /* No DIEs needed for fundamental types. */ | |
12180 | break; | |
12181 | ||
12182 | case LANG_TYPE: | |
12183 | /* No Dwarf representation currently defined. */ | |
12184 | break; | |
12185 | ||
12186 | default: | |
12187 | abort (); | |
12188 | } | |
12189 | ||
12190 | TREE_ASM_WRITTEN (type) = 1; | |
12191 | } | |
12192 | ||
12193 | /* Generate a DIE for a tagged type instantiation. */ | |
71dfc51f | 12194 | |
a3f97cbb | 12195 | static void |
7080f735 | 12196 | gen_tagged_type_instantiation_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12197 | { |
71dfc51f RK |
12198 | if (type == NULL_TREE || type == error_mark_node) |
12199 | return; | |
a3f97cbb | 12200 | |
38e01259 | 12201 | /* We are going to output a DIE to represent the unqualified version of |
a3f97cbb JW |
12202 | this type (i.e. without any const or volatile qualifiers) so make sure |
12203 | that we have the main variant (i.e. the unqualified version) of this | |
12204 | type now. */ | |
bbc6ae08 | 12205 | if (type != type_main_variant (type)) |
3a88cbd1 | 12206 | abort (); |
a3f97cbb | 12207 | |
203588e7 | 12208 | /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is |
bbc6ae08 | 12209 | an instance of an unresolved type. */ |
556273e0 | 12210 | |
a3f97cbb JW |
12211 | switch (TREE_CODE (type)) |
12212 | { | |
12213 | case ERROR_MARK: | |
12214 | break; | |
12215 | ||
12216 | case ENUMERAL_TYPE: | |
12217 | gen_inlined_enumeration_type_die (type, context_die); | |
12218 | break; | |
12219 | ||
12220 | case RECORD_TYPE: | |
12221 | gen_inlined_structure_type_die (type, context_die); | |
12222 | break; | |
12223 | ||
12224 | case UNION_TYPE: | |
12225 | case QUAL_UNION_TYPE: | |
12226 | gen_inlined_union_type_die (type, context_die); | |
12227 | break; | |
12228 | ||
12229 | default: | |
71dfc51f | 12230 | abort (); |
a3f97cbb JW |
12231 | } |
12232 | } | |
12233 | ||
12234 | /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the | |
12235 | things which are local to the given block. */ | |
71dfc51f | 12236 | |
a3f97cbb | 12237 | static void |
7080f735 | 12238 | gen_block_die (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 12239 | { |
b3694847 SS |
12240 | int must_output_die = 0; |
12241 | tree origin; | |
12242 | tree decl; | |
12243 | enum tree_code origin_code; | |
a3f97cbb JW |
12244 | |
12245 | /* Ignore blocks never really used to make RTL. */ | |
1e7f092a JM |
12246 | if (stmt == NULL_TREE || !TREE_USED (stmt) |
12247 | || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt))) | |
71dfc51f | 12248 | return; |
a3f97cbb | 12249 | |
a20612aa RH |
12250 | /* If the block is one fragment of a non-contiguous block, do not |
12251 | process the variables, since they will have been done by the | |
12252 | origin block. Do process subblocks. */ | |
12253 | if (BLOCK_FRAGMENT_ORIGIN (stmt)) | |
12254 | { | |
12255 | tree sub; | |
12256 | ||
2ad9852d | 12257 | for (sub = BLOCK_SUBBLOCKS (stmt); sub; sub = BLOCK_CHAIN (sub)) |
a20612aa | 12258 | gen_block_die (sub, context_die, depth + 1); |
2ad9852d | 12259 | |
a20612aa RH |
12260 | return; |
12261 | } | |
12262 | ||
a3f97cbb JW |
12263 | /* Determine the "ultimate origin" of this block. This block may be an |
12264 | inlined instance of an inlined instance of inline function, so we have | |
12265 | to trace all of the way back through the origin chain to find out what | |
12266 | sort of node actually served as the original seed for the creation of | |
12267 | the current block. */ | |
12268 | origin = block_ultimate_origin (stmt); | |
12269 | origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK; | |
12270 | ||
12271 | /* Determine if we need to output any Dwarf DIEs at all to represent this | |
12272 | block. */ | |
12273 | if (origin_code == FUNCTION_DECL) | |
71dfc51f RK |
12274 | /* The outer scopes for inlinings *must* always be represented. We |
12275 | generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */ | |
12276 | must_output_die = 1; | |
a3f97cbb JW |
12277 | else |
12278 | { | |
12279 | /* In the case where the current block represents an inlining of the | |
73c68f61 SS |
12280 | "body block" of an inline function, we must *NOT* output any DIE for |
12281 | this block because we have already output a DIE to represent the whole | |
12282 | inlined function scope and the "body block" of any function doesn't | |
12283 | really represent a different scope according to ANSI C rules. So we | |
12284 | check here to make sure that this block does not represent a "body | |
12285 | block inlining" before trying to set the MUST_OUTPUT_DIE flag. */ | |
d7248bff | 12286 | if (! is_body_block (origin ? origin : stmt)) |
a3f97cbb JW |
12287 | { |
12288 | /* Determine if this block directly contains any "significant" | |
12289 | local declarations which we will need to output DIEs for. */ | |
12290 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
71dfc51f RK |
12291 | /* We are not in terse mode so *any* local declaration counts |
12292 | as being a "significant" one. */ | |
12293 | must_output_die = (BLOCK_VARS (stmt) != NULL); | |
a3f97cbb | 12294 | else |
71dfc51f RK |
12295 | /* We are in terse mode, so only local (nested) function |
12296 | definitions count as "significant" local declarations. */ | |
12297 | for (decl = BLOCK_VARS (stmt); | |
12298 | decl != NULL; decl = TREE_CHAIN (decl)) | |
12299 | if (TREE_CODE (decl) == FUNCTION_DECL | |
12300 | && DECL_INITIAL (decl)) | |
a3f97cbb | 12301 | { |
71dfc51f RK |
12302 | must_output_die = 1; |
12303 | break; | |
a3f97cbb | 12304 | } |
a3f97cbb JW |
12305 | } |
12306 | } | |
12307 | ||
12308 | /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block | |
12309 | DIE for any block which contains no significant local declarations at | |
12310 | all. Rather, in such cases we just call `decls_for_scope' so that any | |
12311 | needed Dwarf info for any sub-blocks will get properly generated. Note | |
12312 | that in terse mode, our definition of what constitutes a "significant" | |
12313 | local declaration gets restricted to include only inlined function | |
12314 | instances and local (nested) function definitions. */ | |
12315 | if (must_output_die) | |
12316 | { | |
12317 | if (origin_code == FUNCTION_DECL) | |
71dfc51f | 12318 | gen_inlined_subroutine_die (stmt, context_die, depth); |
a3f97cbb | 12319 | else |
71dfc51f | 12320 | gen_lexical_block_die (stmt, context_die, depth); |
a3f97cbb JW |
12321 | } |
12322 | else | |
d7248bff | 12323 | decls_for_scope (stmt, context_die, depth); |
a3f97cbb JW |
12324 | } |
12325 | ||
12326 | /* Generate all of the decls declared within a given scope and (recursively) | |
9ec36da5 | 12327 | all of its sub-blocks. */ |
71dfc51f | 12328 | |
a3f97cbb | 12329 | static void |
7080f735 | 12330 | decls_for_scope (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 12331 | { |
b3694847 SS |
12332 | tree decl; |
12333 | tree subblocks; | |
71dfc51f | 12334 | |
a3f97cbb | 12335 | /* Ignore blocks never really used to make RTL. */ |
71dfc51f RK |
12336 | if (stmt == NULL_TREE || ! TREE_USED (stmt)) |
12337 | return; | |
12338 | ||
88dad228 JM |
12339 | /* Output the DIEs to represent all of the data objects and typedefs |
12340 | declared directly within this block but not within any nested | |
12341 | sub-blocks. Also, nested function and tag DIEs have been | |
12342 | generated with a parent of NULL; fix that up now. */ | |
2ad9852d | 12343 | for (decl = BLOCK_VARS (stmt); decl != NULL; decl = TREE_CHAIN (decl)) |
a3f97cbb | 12344 | { |
b3694847 | 12345 | dw_die_ref die; |
a94dbf2c | 12346 | |
88dad228 | 12347 | if (TREE_CODE (decl) == FUNCTION_DECL) |
a94dbf2c | 12348 | die = lookup_decl_die (decl); |
88dad228 | 12349 | else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)) |
a94dbf2c JM |
12350 | die = lookup_type_die (TREE_TYPE (decl)); |
12351 | else | |
12352 | die = NULL; | |
12353 | ||
71dfc51f | 12354 | if (die != NULL && die->die_parent == NULL) |
ef76d03b | 12355 | add_child_die (context_die, die); |
88dad228 JM |
12356 | else |
12357 | gen_decl_die (decl, context_die); | |
a3f97cbb JW |
12358 | } |
12359 | ||
8cadae7e JM |
12360 | /* If we're at -g1, we're not interested in subblocks. */ |
12361 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
12362 | return; | |
12363 | ||
a3f97cbb JW |
12364 | /* Output the DIEs to represent all sub-blocks (and the items declared |
12365 | therein) of this block. */ | |
12366 | for (subblocks = BLOCK_SUBBLOCKS (stmt); | |
12367 | subblocks != NULL; | |
12368 | subblocks = BLOCK_CHAIN (subblocks)) | |
71dfc51f | 12369 | gen_block_die (subblocks, context_die, depth + 1); |
a3f97cbb JW |
12370 | } |
12371 | ||
a94dbf2c | 12372 | /* Is this a typedef we can avoid emitting? */ |
71dfc51f RK |
12373 | |
12374 | static inline int | |
7080f735 | 12375 | is_redundant_typedef (tree decl) |
a94dbf2c JM |
12376 | { |
12377 | if (TYPE_DECL_IS_STUB (decl)) | |
12378 | return 1; | |
71dfc51f | 12379 | |
a94dbf2c JM |
12380 | if (DECL_ARTIFICIAL (decl) |
12381 | && DECL_CONTEXT (decl) | |
12382 | && is_tagged_type (DECL_CONTEXT (decl)) | |
12383 | && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL | |
12384 | && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl)))) | |
12385 | /* Also ignore the artificial member typedef for the class name. */ | |
12386 | return 1; | |
71dfc51f | 12387 | |
a94dbf2c JM |
12388 | return 0; |
12389 | } | |
12390 | ||
6097b0c3 DP |
12391 | /* Returns the DIE for decl or aborts. */ |
12392 | ||
12393 | static dw_die_ref | |
12394 | force_decl_die (tree decl) | |
12395 | { | |
12396 | dw_die_ref decl_die; | |
12397 | unsigned saved_external_flag; | |
12398 | tree save_fn = NULL_TREE; | |
12399 | decl_die = lookup_decl_die (decl); | |
12400 | if (!decl_die) | |
12401 | { | |
12402 | dw_die_ref context_die; | |
12403 | tree decl_context = DECL_CONTEXT (decl); | |
12404 | if (decl_context) | |
12405 | { | |
12406 | /* Find die that represents this context. */ | |
12407 | if (TYPE_P (decl_context)) | |
12408 | context_die = force_type_die (decl_context); | |
12409 | else | |
12410 | context_die = force_decl_die (decl_context); | |
12411 | } | |
12412 | else | |
12413 | context_die = comp_unit_die; | |
12414 | ||
12415 | switch (TREE_CODE (decl)) | |
12416 | { | |
12417 | case FUNCTION_DECL: | |
12418 | /* Clear current_function_decl, so that gen_subprogram_die thinks | |
12419 | that this is a declaration. At this point, we just want to force | |
12420 | declaration die. */ | |
12421 | save_fn = current_function_decl; | |
12422 | current_function_decl = NULL_TREE; | |
12423 | gen_subprogram_die (decl, context_die); | |
12424 | current_function_decl = save_fn; | |
12425 | break; | |
12426 | ||
12427 | case VAR_DECL: | |
12428 | /* Set external flag to force declaration die. Restore it after | |
12429 | gen_decl_die() call. */ | |
12430 | saved_external_flag = DECL_EXTERNAL (decl); | |
12431 | DECL_EXTERNAL (decl) = 1; | |
12432 | gen_decl_die (decl, context_die); | |
12433 | DECL_EXTERNAL (decl) = saved_external_flag; | |
12434 | break; | |
12435 | ||
12436 | case NAMESPACE_DECL: | |
12437 | dwarf2out_decl (decl); | |
12438 | break; | |
12439 | ||
12440 | default: | |
12441 | abort (); | |
12442 | } | |
12443 | ||
12444 | /* See if we can find the die for this deci now. | |
12445 | If not then abort. */ | |
12446 | if (!decl_die) | |
12447 | decl_die = lookup_decl_die (decl); | |
12448 | if (!decl_die) | |
12449 | abort (); | |
12450 | } | |
12451 | ||
12452 | return decl_die; | |
12453 | } | |
66c78aa9 | 12454 | |
6097b0c3 | 12455 | /* Returns the DIE for decl or aborts. */ |
66c78aa9 JM |
12456 | |
12457 | static dw_die_ref | |
6097b0c3 | 12458 | force_type_die (tree type) |
66c78aa9 | 12459 | { |
6097b0c3 | 12460 | dw_die_ref type_die; |
66c78aa9 | 12461 | |
9733d507 | 12462 | type_die = lookup_type_die (type); |
6097b0c3 DP |
12463 | if (!type_die) |
12464 | { | |
12465 | dw_die_ref context_die; | |
12466 | if (TYPE_CONTEXT (type)) | |
12467 | if (TYPE_P (TYPE_CONTEXT (type))) | |
12468 | context_die = force_type_die (TYPE_CONTEXT (type)); | |
12469 | else | |
12470 | context_die = force_decl_die (TYPE_CONTEXT (type)); | |
12471 | else | |
12472 | context_die = comp_unit_die; | |
66c78aa9 | 12473 | |
6097b0c3 | 12474 | gen_type_die (type, context_die); |
9733d507 | 12475 | type_die = lookup_type_die (type); |
6097b0c3 DP |
12476 | if (!type_die) |
12477 | abort(); | |
12478 | } | |
12479 | return type_die; | |
66c78aa9 JM |
12480 | } |
12481 | ||
12482 | /* Force out any required namespaces to be able to output DECL, | |
12483 | and return the new context_die for it, if it's changed. */ | |
12484 | ||
12485 | static dw_die_ref | |
12486 | setup_namespace_context (tree thing, dw_die_ref context_die) | |
12487 | { | |
12488 | tree context = DECL_P (thing) ? DECL_CONTEXT (thing) : TYPE_CONTEXT (thing); | |
12489 | if (context && TREE_CODE (context) == NAMESPACE_DECL) | |
6614fd40 | 12490 | /* Force out the namespace. */ |
6097b0c3 | 12491 | context_die = force_decl_die (context); |
66c78aa9 JM |
12492 | |
12493 | return context_die; | |
12494 | } | |
12495 | ||
12496 | /* Emit a declaration DIE for THING (which is either a DECL or a tagged | |
12497 | type) within its namespace, if appropriate. | |
12498 | ||
12499 | For compatibility with older debuggers, namespace DIEs only contain | |
12500 | declarations; all definitions are emitted at CU scope. */ | |
12501 | ||
12502 | static void | |
12503 | declare_in_namespace (tree thing, dw_die_ref context_die) | |
12504 | { | |
12505 | dw_die_ref ns_context; | |
12506 | ||
12507 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
12508 | return; | |
12509 | ||
12510 | ns_context = setup_namespace_context (thing, context_die); | |
12511 | ||
12512 | if (ns_context != context_die) | |
12513 | { | |
12514 | if (DECL_P (thing)) | |
12515 | gen_decl_die (thing, ns_context); | |
12516 | else | |
12517 | gen_type_die (thing, ns_context); | |
12518 | } | |
12519 | } | |
12520 | ||
6614fd40 | 12521 | /* Generate a DIE for a namespace or namespace alias. */ |
66c78aa9 JM |
12522 | |
12523 | static void | |
12524 | gen_namespace_die (tree decl) | |
12525 | { | |
12526 | dw_die_ref context_die = setup_namespace_context (decl, comp_unit_die); | |
12527 | ||
12528 | /* Namespace aliases have a DECL_ABSTRACT_ORIGIN of the namespace | |
e0a21ab9 | 12529 | they are an alias of. */ |
66c78aa9 JM |
12530 | if (DECL_ABSTRACT_ORIGIN (decl) == NULL) |
12531 | { | |
6614fd40 | 12532 | /* Output a real namespace. */ |
66c78aa9 JM |
12533 | dw_die_ref namespace_die |
12534 | = new_die (DW_TAG_namespace, context_die, decl); | |
12535 | add_name_and_src_coords_attributes (namespace_die, decl); | |
12536 | equate_decl_number_to_die (decl, namespace_die); | |
12537 | } | |
12538 | else | |
12539 | { | |
6614fd40 | 12540 | /* Output a namespace alias. */ |
66c78aa9 | 12541 | |
6614fd40 | 12542 | /* Force out the namespace we are an alias of, if necessary. */ |
66c78aa9 | 12543 | dw_die_ref origin_die |
6097b0c3 | 12544 | = force_decl_die (DECL_ABSTRACT_ORIGIN (decl)); |
66c78aa9 | 12545 | |
6614fd40 | 12546 | /* Now create the namespace alias DIE. */ |
66c78aa9 JM |
12547 | dw_die_ref namespace_die |
12548 | = new_die (DW_TAG_imported_declaration, context_die, decl); | |
12549 | add_name_and_src_coords_attributes (namespace_die, decl); | |
12550 | add_AT_die_ref (namespace_die, DW_AT_import, origin_die); | |
12551 | equate_decl_number_to_die (decl, namespace_die); | |
12552 | } | |
12553 | } | |
12554 | ||
a3f97cbb | 12555 | /* Generate Dwarf debug information for a decl described by DECL. */ |
71dfc51f | 12556 | |
a3f97cbb | 12557 | static void |
7080f735 | 12558 | gen_decl_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 12559 | { |
b3694847 | 12560 | tree origin; |
71dfc51f | 12561 | |
f11c3043 | 12562 | if (DECL_P (decl) && DECL_IGNORED_P (decl)) |
71dfc51f | 12563 | return; |
a3f97cbb | 12564 | |
a3f97cbb JW |
12565 | switch (TREE_CODE (decl)) |
12566 | { | |
2ad9852d RK |
12567 | case ERROR_MARK: |
12568 | break; | |
12569 | ||
a3f97cbb | 12570 | case CONST_DECL: |
556273e0 | 12571 | /* The individual enumerators of an enum type get output when we output |
73c68f61 | 12572 | the Dwarf representation of the relevant enum type itself. */ |
a3f97cbb JW |
12573 | break; |
12574 | ||
12575 | case FUNCTION_DECL: | |
4edb7b60 JM |
12576 | /* Don't output any DIEs to represent mere function declarations, |
12577 | unless they are class members or explicit block externs. */ | |
12578 | if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE | |
777ad4c2 | 12579 | && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl))) |
71dfc51f | 12580 | break; |
bdb669cb | 12581 | |
6de9cd9a DN |
12582 | #if 0 |
12583 | /* FIXME */ | |
12584 | /* This doesn't work because the C frontend sets DECL_ABSTRACT_ORIGIN | |
12585 | on local redeclarations of global functions. That seems broken. */ | |
12586 | if (current_function_decl != decl) | |
12587 | /* This is only a declaration. */; | |
12588 | #endif | |
12589 | ||
5daf7c0a JM |
12590 | /* If we're emitting a clone, emit info for the abstract instance. */ |
12591 | if (DECL_ORIGIN (decl) != decl) | |
12592 | dwarf2out_abstract_function (DECL_ABSTRACT_ORIGIN (decl)); | |
2ad9852d | 12593 | |
1cfdcc15 JM |
12594 | /* If we're emitting an out-of-line copy of an inline function, |
12595 | emit info for the abstract instance and set up to refer to it. */ | |
1bb17c21 JH |
12596 | else if (cgraph_function_possibly_inlined_p (decl) |
12597 | && ! DECL_ABSTRACT (decl) | |
66c78aa9 | 12598 | && ! class_or_namespace_scope_p (context_die) |
5daf7c0a JM |
12599 | /* dwarf2out_abstract_function won't emit a die if this is just |
12600 | a declaration. We must avoid setting DECL_ABSTRACT_ORIGIN in | |
12601 | that case, because that works only if we have a die. */ | |
12602 | && DECL_INITIAL (decl) != NULL_TREE) | |
1cfdcc15 | 12603 | { |
1edf43d6 | 12604 | dwarf2out_abstract_function (decl); |
1cfdcc15 JM |
12605 | set_decl_origin_self (decl); |
12606 | } | |
2ad9852d | 12607 | |
5daf7c0a JM |
12608 | /* Otherwise we're emitting the primary DIE for this decl. */ |
12609 | else if (debug_info_level > DINFO_LEVEL_TERSE) | |
a94dbf2c JM |
12610 | { |
12611 | /* Before we describe the FUNCTION_DECL itself, make sure that we | |
12612 | have described its return type. */ | |
12613 | gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die); | |
12614 | ||
2081603c JM |
12615 | /* And its virtual context. */ |
12616 | if (DECL_VINDEX (decl) != NULL_TREE) | |
12617 | gen_type_die (DECL_CONTEXT (decl), context_die); | |
12618 | ||
a94dbf2c JM |
12619 | /* And its containing type. */ |
12620 | origin = decl_class_context (decl); | |
71dfc51f | 12621 | if (origin != NULL_TREE) |
10a11b75 | 12622 | gen_type_die_for_member (origin, decl, context_die); |
66c78aa9 JM |
12623 | |
12624 | /* And its containing namespace. */ | |
12625 | declare_in_namespace (decl, context_die); | |
a94dbf2c | 12626 | } |
a3f97cbb JW |
12627 | |
12628 | /* Now output a DIE to represent the function itself. */ | |
12629 | gen_subprogram_die (decl, context_die); | |
12630 | break; | |
12631 | ||
12632 | case TYPE_DECL: | |
12633 | /* If we are in terse mode, don't generate any DIEs to represent any | |
73c68f61 | 12634 | actual typedefs. */ |
a3f97cbb | 12635 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
4927276d | 12636 | break; |
a3f97cbb | 12637 | |
2ad9852d | 12638 | /* In the special case of a TYPE_DECL node representing the declaration |
73c68f61 SS |
12639 | of some type tag, if the given TYPE_DECL is marked as having been |
12640 | instantiated from some other (original) TYPE_DECL node (e.g. one which | |
12641 | was generated within the original definition of an inline function) we | |
12642 | have to generate a special (abbreviated) DW_TAG_structure_type, | |
12643 | DW_TAG_union_type, or DW_TAG_enumeration_type DIE here. */ | |
2081603c | 12644 | if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE) |
a3f97cbb JW |
12645 | { |
12646 | gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die); | |
12647 | break; | |
12648 | } | |
a3f97cbb | 12649 | |
a94dbf2c JM |
12650 | if (is_redundant_typedef (decl)) |
12651 | gen_type_die (TREE_TYPE (decl), context_die); | |
12652 | else | |
71dfc51f RK |
12653 | /* Output a DIE to represent the typedef itself. */ |
12654 | gen_typedef_die (decl, context_die); | |
a3f97cbb JW |
12655 | break; |
12656 | ||
12657 | case LABEL_DECL: | |
12658 | if (debug_info_level >= DINFO_LEVEL_NORMAL) | |
71dfc51f | 12659 | gen_label_die (decl, context_die); |
a3f97cbb JW |
12660 | break; |
12661 | ||
12662 | case VAR_DECL: | |
6de9cd9a | 12663 | case RESULT_DECL: |
a3f97cbb | 12664 | /* If we are in terse mode, don't generate any DIEs to represent any |
73c68f61 | 12665 | variable declarations or definitions. */ |
a3f97cbb | 12666 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 12667 | break; |
a3f97cbb JW |
12668 | |
12669 | /* Output any DIEs that are needed to specify the type of this data | |
73c68f61 | 12670 | object. */ |
a3f97cbb JW |
12671 | gen_type_die (TREE_TYPE (decl), context_die); |
12672 | ||
a94dbf2c JM |
12673 | /* And its containing type. */ |
12674 | origin = decl_class_context (decl); | |
71dfc51f | 12675 | if (origin != NULL_TREE) |
10a11b75 | 12676 | gen_type_die_for_member (origin, decl, context_die); |
a94dbf2c | 12677 | |
66c78aa9 JM |
12678 | /* And its containing namespace. */ |
12679 | declare_in_namespace (decl, context_die); | |
12680 | ||
a3f97cbb | 12681 | /* Now output the DIE to represent the data object itself. This gets |
73c68f61 SS |
12682 | complicated because of the possibility that the VAR_DECL really |
12683 | represents an inlined instance of a formal parameter for an inline | |
12684 | function. */ | |
a3f97cbb | 12685 | origin = decl_ultimate_origin (decl); |
71dfc51f RK |
12686 | if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL) |
12687 | gen_formal_parameter_die (decl, context_die); | |
a3f97cbb | 12688 | else |
71dfc51f | 12689 | gen_variable_die (decl, context_die); |
a3f97cbb JW |
12690 | break; |
12691 | ||
12692 | case FIELD_DECL: | |
2ad9852d | 12693 | /* Ignore the nameless fields that are used to skip bits but handle C++ |
3199cb41 | 12694 | anonymous unions and structs. */ |
71dfc51f | 12695 | if (DECL_NAME (decl) != NULL_TREE |
3199cb41 UW |
12696 | || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE |
12697 | || TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE) | |
a3f97cbb JW |
12698 | { |
12699 | gen_type_die (member_declared_type (decl), context_die); | |
12700 | gen_field_die (decl, context_die); | |
12701 | } | |
12702 | break; | |
12703 | ||
12704 | case PARM_DECL: | |
12705 | gen_type_die (TREE_TYPE (decl), context_die); | |
12706 | gen_formal_parameter_die (decl, context_die); | |
12707 | break; | |
12708 | ||
348bb3c7 | 12709 | case NAMESPACE_DECL: |
66c78aa9 | 12710 | gen_namespace_die (decl); |
348bb3c7 JM |
12711 | break; |
12712 | ||
a3f97cbb | 12713 | default: |
ae0e5982 JM |
12714 | if ((int)TREE_CODE (decl) > NUM_TREE_CODES) |
12715 | /* Probably some frontend-internal decl. Assume we don't care. */ | |
12716 | break; | |
a3f97cbb JW |
12717 | abort (); |
12718 | } | |
a3f97cbb JW |
12719 | } |
12720 | \f | |
14a774a9 RK |
12721 | /* Add Ada "use" clause information for SGI Workshop debugger. */ |
12722 | ||
12723 | void | |
7080f735 | 12724 | dwarf2out_add_library_unit_info (const char *filename, const char *context_list) |
14a774a9 RK |
12725 | { |
12726 | unsigned int file_index; | |
12727 | ||
12728 | if (filename != NULL) | |
12729 | { | |
54ba1f0d | 12730 | dw_die_ref unit_die = new_die (DW_TAG_module, comp_unit_die, NULL); |
556273e0 | 12731 | tree context_list_decl |
14a774a9 RK |
12732 | = build_decl (LABEL_DECL, get_identifier (context_list), |
12733 | void_type_node); | |
12734 | ||
12735 | TREE_PUBLIC (context_list_decl) = TRUE; | |
12736 | add_name_attribute (unit_die, context_list); | |
981975b6 | 12737 | file_index = lookup_filename (filename); |
14a774a9 RK |
12738 | add_AT_unsigned (unit_die, DW_AT_decl_file, file_index); |
12739 | add_pubname (context_list_decl, unit_die); | |
12740 | } | |
12741 | } | |
12742 | ||
2ad9852d | 12743 | /* Output debug information for global decl DECL. Called from toplev.c after |
2b85879e | 12744 | compilation proper has finished. */ |
2ad9852d | 12745 | |
2b85879e | 12746 | static void |
7080f735 | 12747 | dwarf2out_global_decl (tree decl) |
2b85879e NB |
12748 | { |
12749 | /* Output DWARF2 information for file-scope tentative data object | |
2ad9852d RK |
12750 | declarations, file-scope (extern) function declarations (which had no |
12751 | corresponding body) and file-scope tagged type declarations and | |
12752 | definitions which have not yet been forced out. */ | |
2b85879e NB |
12753 | if (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)) |
12754 | dwarf2out_decl (decl); | |
12755 | } | |
12756 | ||
21d13d83 ZW |
12757 | /* Output debug information for type decl DECL. Called from toplev.c |
12758 | and from language front ends (to record built-in types). */ | |
12759 | static void | |
12760 | dwarf2out_type_decl (tree decl, int local) | |
12761 | { | |
12762 | if (!local) | |
12763 | dwarf2out_decl (decl); | |
12764 | } | |
12765 | ||
6097b0c3 DP |
12766 | /* Output debug information for imported module or decl. */ |
12767 | ||
12768 | static void | |
12769 | dwarf2out_imported_module_or_decl (tree decl, tree context) | |
12770 | { | |
12771 | dw_die_ref imported_die, at_import_die; | |
12772 | dw_die_ref scope_die; | |
12773 | unsigned file_index; | |
12774 | ||
12775 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
12776 | return; | |
12777 | ||
12778 | if (!decl) | |
12779 | abort (); | |
12780 | ||
12781 | /* To emit DW_TAG_imported_module or DW_TAG_imported_decl, we need two DIEs. | |
12782 | We need decl DIE for reference and scope die. First, get DIE for the decl | |
12783 | itself. */ | |
12784 | ||
12785 | /* Get the scope die for decl context. Use comp_unit_die for global module | |
12786 | or decl. If die is not found for non globals, force new die. */ | |
12787 | if (!context) | |
12788 | scope_die = comp_unit_die; | |
12789 | else if (TYPE_P (context)) | |
12790 | scope_die = force_type_die (context); | |
12791 | else | |
12792 | scope_die = force_decl_die (context); | |
12793 | ||
834eb1f0 GS |
12794 | /* For TYPE_DECL or CONST_DECL, lookup TREE_TYPE. */ |
12795 | if (TREE_CODE (decl) == TYPE_DECL || TREE_CODE (decl) == CONST_DECL) | |
6097b0c3 DP |
12796 | at_import_die = force_type_die (TREE_TYPE (decl)); |
12797 | else | |
12798 | at_import_die = force_decl_die (decl); | |
12799 | ||
12800 | /* OK, now we have DIEs for decl as well as scope. Emit imported die. */ | |
12801 | if (TREE_CODE (decl) == NAMESPACE_DECL) | |
12802 | imported_die = new_die (DW_TAG_imported_module, scope_die, context); | |
12803 | else | |
12804 | imported_die = new_die (DW_TAG_imported_declaration, scope_die, context); | |
12805 | ||
12806 | file_index = lookup_filename (input_filename); | |
12807 | add_AT_unsigned (imported_die, DW_AT_decl_file, file_index); | |
12808 | add_AT_unsigned (imported_die, DW_AT_decl_line, input_line); | |
12809 | add_AT_die_ref (imported_die, DW_AT_import, at_import_die); | |
12810 | } | |
12811 | ||
71dfc51f RK |
12812 | /* Write the debugging output for DECL. */ |
12813 | ||
a3f97cbb | 12814 | void |
7080f735 | 12815 | dwarf2out_decl (tree decl) |
a3f97cbb | 12816 | { |
b3694847 | 12817 | dw_die_ref context_die = comp_unit_die; |
88dad228 | 12818 | |
a3f97cbb JW |
12819 | switch (TREE_CODE (decl)) |
12820 | { | |
2ad9852d RK |
12821 | case ERROR_MARK: |
12822 | return; | |
12823 | ||
a3f97cbb | 12824 | case FUNCTION_DECL: |
a3f97cbb | 12825 | /* What we would really like to do here is to filter out all mere |
73c68f61 SS |
12826 | file-scope declarations of file-scope functions which are never |
12827 | referenced later within this translation unit (and keep all of ones | |
12828 | that *are* referenced later on) but we aren't clairvoyant, so we have | |
12829 | no idea which functions will be referenced in the future (i.e. later | |
12830 | on within the current translation unit). So here we just ignore all | |
12831 | file-scope function declarations which are not also definitions. If | |
12832 | and when the debugger needs to know something about these functions, | |
12833 | it will have to hunt around and find the DWARF information associated | |
12834 | with the definition of the function. | |
2ad9852d RK |
12835 | |
12836 | We can't just check DECL_EXTERNAL to find out which FUNCTION_DECL | |
73c68f61 SS |
12837 | nodes represent definitions and which ones represent mere |
12838 | declarations. We have to check DECL_INITIAL instead. That's because | |
12839 | the C front-end supports some weird semantics for "extern inline" | |
12840 | function definitions. These can get inlined within the current | |
12841 | translation unit (an thus, we need to generate Dwarf info for their | |
12842 | abstract instances so that the Dwarf info for the concrete inlined | |
12843 | instances can have something to refer to) but the compiler never | |
12844 | generates any out-of-lines instances of such things (despite the fact | |
12845 | that they *are* definitions). | |
2ad9852d RK |
12846 | |
12847 | The important point is that the C front-end marks these "extern | |
12848 | inline" functions as DECL_EXTERNAL, but we need to generate DWARF for | |
12849 | them anyway. Note that the C++ front-end also plays some similar games | |
12850 | for inline function definitions appearing within include files which | |
12851 | also contain `#pragma interface' pragmas. */ | |
a3f97cbb | 12852 | if (DECL_INITIAL (decl) == NULL_TREE) |
b1ccbc24 | 12853 | return; |
88dad228 | 12854 | |
9c6cd30e JM |
12855 | /* If we're a nested function, initially use a parent of NULL; if we're |
12856 | a plain function, this will be fixed up in decls_for_scope. If | |
12857 | we're a method, it will be ignored, since we already have a DIE. */ | |
8cadae7e JM |
12858 | if (decl_function_context (decl) |
12859 | /* But if we're in terse mode, we don't care about scope. */ | |
12860 | && debug_info_level > DINFO_LEVEL_TERSE) | |
9c6cd30e | 12861 | context_die = NULL; |
a3f97cbb JW |
12862 | break; |
12863 | ||
12864 | case VAR_DECL: | |
556273e0 | 12865 | /* Ignore this VAR_DECL if it refers to a file-scope extern data object |
73c68f61 SS |
12866 | declaration and if the declaration was never even referenced from |
12867 | within this entire compilation unit. We suppress these DIEs in | |
12868 | order to save space in the .debug section (by eliminating entries | |
12869 | which are probably useless). Note that we must not suppress | |
12870 | block-local extern declarations (whether used or not) because that | |
12871 | would screw-up the debugger's name lookup mechanism and cause it to | |
12872 | miss things which really ought to be in scope at a given point. */ | |
a3f97cbb | 12873 | if (DECL_EXTERNAL (decl) && !TREE_USED (decl)) |
71dfc51f | 12874 | return; |
a3f97cbb JW |
12875 | |
12876 | /* If we are in terse mode, don't generate any DIEs to represent any | |
73c68f61 | 12877 | variable declarations or definitions. */ |
a3f97cbb | 12878 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 12879 | return; |
a3f97cbb JW |
12880 | break; |
12881 | ||
66c78aa9 JM |
12882 | case NAMESPACE_DECL: |
12883 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
12884 | return; | |
12885 | if (lookup_decl_die (decl) != NULL) | |
12886 | return; | |
12887 | break; | |
12888 | ||
a3f97cbb | 12889 | case TYPE_DECL: |
57fb7689 JM |
12890 | /* Don't emit stubs for types unless they are needed by other DIEs. */ |
12891 | if (TYPE_DECL_SUPPRESS_DEBUG (decl)) | |
12892 | return; | |
12893 | ||
a3f97cbb | 12894 | /* Don't bother trying to generate any DIEs to represent any of the |
73c68f61 | 12895 | normal built-in types for the language we are compiling. */ |
f31686a3 | 12896 | if (DECL_SOURCE_LINE (decl) == 0) |
a94dbf2c JM |
12897 | { |
12898 | /* OK, we need to generate one for `bool' so GDB knows what type | |
73c68f61 | 12899 | comparisons have. */ |
a94dbf2c JM |
12900 | if ((get_AT_unsigned (comp_unit_die, DW_AT_language) |
12901 | == DW_LANG_C_plus_plus) | |
f11c3043 RK |
12902 | && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE |
12903 | && ! DECL_IGNORED_P (decl)) | |
a94dbf2c | 12904 | modified_type_die (TREE_TYPE (decl), 0, 0, NULL); |
71dfc51f | 12905 | |
a94dbf2c JM |
12906 | return; |
12907 | } | |
a3f97cbb | 12908 | |
88dad228 | 12909 | /* If we are in terse mode, don't generate any DIEs for types. */ |
a3f97cbb | 12910 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
4927276d | 12911 | return; |
88dad228 JM |
12912 | |
12913 | /* If we're a function-scope tag, initially use a parent of NULL; | |
12914 | this will be fixed up in decls_for_scope. */ | |
12915 | if (decl_function_context (decl)) | |
3f76745e | 12916 | context_die = NULL; |
88dad228 | 12917 | |
a3f97cbb JW |
12918 | break; |
12919 | ||
12920 | default: | |
12921 | return; | |
12922 | } | |
12923 | ||
88dad228 | 12924 | gen_decl_die (decl, context_die); |
a3f97cbb JW |
12925 | } |
12926 | ||
12927 | /* Output a marker (i.e. a label) for the beginning of the generated code for | |
12928 | a lexical block. */ | |
71dfc51f | 12929 | |
a5a42b92 | 12930 | static void |
7080f735 AJ |
12931 | dwarf2out_begin_block (unsigned int line ATTRIBUTE_UNUSED, |
12932 | unsigned int blocknum) | |
a3f97cbb | 12933 | { |
a3f97cbb | 12934 | function_section (current_function_decl); |
8215347e | 12935 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum); |
a3f97cbb JW |
12936 | } |
12937 | ||
12938 | /* Output a marker (i.e. a label) for the end of the generated code for a | |
12939 | lexical block. */ | |
71dfc51f | 12940 | |
a5a42b92 | 12941 | static void |
7080f735 | 12942 | dwarf2out_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int blocknum) |
a3f97cbb | 12943 | { |
a3f97cbb | 12944 | function_section (current_function_decl); |
8215347e | 12945 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum); |
a3f97cbb JW |
12946 | } |
12947 | ||
64b59a80 JM |
12948 | /* Returns nonzero if it is appropriate not to emit any debugging |
12949 | information for BLOCK, because it doesn't contain any instructions. | |
fcd7f76b | 12950 | |
64b59a80 JM |
12951 | Don't allow this for blocks with nested functions or local classes |
12952 | as we would end up with orphans, and in the presence of scheduling | |
12953 | we may end up calling them anyway. */ | |
12954 | ||
e1772ac0 | 12955 | static bool |
7080f735 | 12956 | dwarf2out_ignore_block (tree block) |
fcd7f76b JM |
12957 | { |
12958 | tree decl; | |
2ad9852d | 12959 | |
fcd7f76b | 12960 | for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl)) |
64b59a80 JM |
12961 | if (TREE_CODE (decl) == FUNCTION_DECL |
12962 | || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))) | |
12963 | return 0; | |
2ad9852d | 12964 | |
64b59a80 | 12965 | return 1; |
fcd7f76b JM |
12966 | } |
12967 | ||
2ad9852d | 12968 | /* Lookup FILE_NAME (in the list of filenames that we know about here in |
9a666dda | 12969 | dwarf2out.c) and return its "index". The index of each (known) filename is |
2ad9852d RK |
12970 | just a unique number which is associated with only that one filename. We |
12971 | need such numbers for the sake of generating labels (in the .debug_sfnames | |
12972 | section) and references to those files numbers (in the .debug_srcinfo | |
12973 | and.debug_macinfo sections). If the filename given as an argument is not | |
12974 | found in our current list, add it to the list and assign it the next | |
12975 | available unique index number. In order to speed up searches, we remember | |
12976 | the index of the filename was looked up last. This handles the majority of | |
12977 | all searches. */ | |
71dfc51f | 12978 | |
a3f97cbb | 12979 | static unsigned |
7080f735 | 12980 | lookup_filename (const char *file_name) |
a3f97cbb | 12981 | { |
c4274b22 RH |
12982 | size_t i, n; |
12983 | char *save_file_name; | |
a3f97cbb | 12984 | |
2e18bbae RH |
12985 | /* Check to see if the file name that was searched on the previous |
12986 | call matches this file name. If so, return the index. */ | |
c4274b22 RH |
12987 | if (file_table_last_lookup_index != 0) |
12988 | { | |
12989 | const char *last | |
12990 | = VARRAY_CHAR_PTR (file_table, file_table_last_lookup_index); | |
12991 | if (strcmp (file_name, last) == 0) | |
73c68f61 | 12992 | return file_table_last_lookup_index; |
c4274b22 | 12993 | } |
a3f97cbb JW |
12994 | |
12995 | /* Didn't match the previous lookup, search the table */ | |
c4274b22 RH |
12996 | n = VARRAY_ACTIVE_SIZE (file_table); |
12997 | for (i = 1; i < n; i++) | |
12998 | if (strcmp (file_name, VARRAY_CHAR_PTR (file_table, i)) == 0) | |
71dfc51f | 12999 | { |
c4274b22 | 13000 | file_table_last_lookup_index = i; |
71dfc51f RK |
13001 | return i; |
13002 | } | |
a3f97cbb | 13003 | |
71dfc51f | 13004 | /* Add the new entry to the end of the filename table. */ |
c4274b22 RH |
13005 | file_table_last_lookup_index = n; |
13006 | save_file_name = (char *) ggc_strdup (file_name); | |
13007 | VARRAY_PUSH_CHAR_PTR (file_table, save_file_name); | |
73c68f61 | 13008 | VARRAY_PUSH_UINT (file_table_emitted, 0); |
2e18bbae | 13009 | |
73c68f61 SS |
13010 | return i; |
13011 | } | |
13012 | ||
13013 | static int | |
7080f735 | 13014 | maybe_emit_file (int fileno) |
73c68f61 | 13015 | { |
73c68f61 | 13016 | if (DWARF2_ASM_LINE_DEBUG_INFO && fileno > 0) |
211a0cbe | 13017 | { |
73c68f61 SS |
13018 | if (!VARRAY_UINT (file_table_emitted, fileno)) |
13019 | { | |
13020 | VARRAY_UINT (file_table_emitted, fileno) = ++emitcount; | |
13021 | fprintf (asm_out_file, "\t.file %u ", | |
13022 | VARRAY_UINT (file_table_emitted, fileno)); | |
13023 | output_quoted_string (asm_out_file, | |
13024 | VARRAY_CHAR_PTR (file_table, fileno)); | |
13025 | fputc ('\n', asm_out_file); | |
13026 | } | |
13027 | return VARRAY_UINT (file_table_emitted, fileno); | |
211a0cbe | 13028 | } |
73c68f61 SS |
13029 | else |
13030 | return fileno; | |
2e18bbae RH |
13031 | } |
13032 | ||
13033 | static void | |
7080f735 | 13034 | init_file_table (void) |
2e18bbae RH |
13035 | { |
13036 | /* Allocate the initial hunk of the file_table. */ | |
c4274b22 | 13037 | VARRAY_CHAR_PTR_INIT (file_table, 64, "file_table"); |
73c68f61 | 13038 | VARRAY_UINT_INIT (file_table_emitted, 64, "file_table_emitted"); |
71dfc51f | 13039 | |
2e18bbae | 13040 | /* Skip the first entry - file numbers begin at 1. */ |
c4274b22 | 13041 | VARRAY_PUSH_CHAR_PTR (file_table, NULL); |
73c68f61 | 13042 | VARRAY_PUSH_UINT (file_table_emitted, 0); |
c4274b22 | 13043 | file_table_last_lookup_index = 0; |
a3f97cbb JW |
13044 | } |
13045 | ||
0a2d3d69 DB |
13046 | /* Called by the final INSN scan whenever we see a var location. We |
13047 | use it to drop labels in the right places, and throw the location in | |
13048 | our lookup table. */ | |
13049 | ||
13050 | static void | |
13051 | dwarf2out_var_location (rtx loc_note) | |
13052 | { | |
13053 | char loclabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
13054 | struct var_loc_node *newloc; | |
13055 | rtx prev_insn; | |
13056 | static rtx last_insn; | |
13057 | static const char *last_label; | |
13058 | ||
13059 | if (!DECL_P (NOTE_VAR_LOCATION_DECL (loc_note))) | |
13060 | return; | |
13061 | prev_insn = PREV_INSN (loc_note); | |
13062 | ||
13063 | newloc = ggc_alloc_cleared (sizeof (struct var_loc_node)); | |
13064 | /* If the insn we processed last time is the previous insn | |
13065 | and it is also a var location note, use the label we emitted | |
13066 | last time. */ | |
13067 | if (last_insn != NULL_RTX | |
13068 | && last_insn == prev_insn | |
13069 | && GET_CODE (prev_insn) == NOTE | |
13070 | && NOTE_LINE_NUMBER (prev_insn) == NOTE_INSN_VAR_LOCATION) | |
13071 | { | |
13072 | newloc->label = last_label; | |
13073 | } | |
13074 | else | |
13075 | { | |
13076 | ASM_GENERATE_INTERNAL_LABEL (loclabel, "LVL", loclabel_num); | |
13077 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, "LVL", loclabel_num); | |
13078 | loclabel_num++; | |
13079 | newloc->label = ggc_strdup (loclabel); | |
13080 | } | |
13081 | newloc->var_loc_note = loc_note; | |
13082 | newloc->next = NULL; | |
13083 | ||
13084 | last_insn = loc_note; | |
13085 | last_label = newloc->label; | |
13086 | ||
13087 | add_var_loc_to_decl (NOTE_VAR_LOCATION_DECL (loc_note), newloc); | |
13088 | } | |
13089 | ||
13090 | /* We need to reset the locations at the beginning of each | |
13091 | function. We can't do this in the end_function hook, because the | |
13092 | declarations that use the locations won't have been outputted when | |
13093 | that hook is called. */ | |
13094 | ||
13095 | static void | |
13096 | dwarf2out_begin_function (tree unused ATTRIBUTE_UNUSED) | |
13097 | { | |
13098 | htab_empty (decl_loc_table); | |
13099 | } | |
13100 | ||
a3f97cbb JW |
13101 | /* Output a label to mark the beginning of a source code line entry |
13102 | and record information relating to this source line, in | |
13103 | 'line_info_table' for later output of the .debug_line section. */ | |
71dfc51f | 13104 | |
e2a12aca | 13105 | static void |
7080f735 | 13106 | dwarf2out_source_line (unsigned int line, const char *filename) |
a3f97cbb | 13107 | { |
7bf6b23d JM |
13108 | if (debug_info_level >= DINFO_LEVEL_NORMAL |
13109 | && line != 0) | |
a3f97cbb JW |
13110 | { |
13111 | function_section (current_function_decl); | |
a3f97cbb | 13112 | |
8aaf55ac JM |
13113 | /* If requested, emit something human-readable. */ |
13114 | if (flag_debug_asm) | |
13115 | fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START, | |
13116 | filename, line); | |
13117 | ||
b2244e22 JW |
13118 | if (DWARF2_ASM_LINE_DEBUG_INFO) |
13119 | { | |
981975b6 | 13120 | unsigned file_num = lookup_filename (filename); |
b2244e22 | 13121 | |
73c68f61 SS |
13122 | file_num = maybe_emit_file (file_num); |
13123 | ||
981975b6 | 13124 | /* Emit the .loc directive understood by GNU as. */ |
2e18bbae | 13125 | fprintf (asm_out_file, "\t.loc %d %d 0\n", file_num, line); |
b2244e22 JW |
13126 | |
13127 | /* Indicate that line number info exists. */ | |
2ad9852d | 13128 | line_info_table_in_use++; |
b2244e22 JW |
13129 | |
13130 | /* Indicate that multiple line number tables exist. */ | |
13131 | if (DECL_SECTION_NAME (current_function_decl)) | |
2ad9852d | 13132 | separate_line_info_table_in_use++; |
b2244e22 JW |
13133 | } |
13134 | else if (DECL_SECTION_NAME (current_function_decl)) | |
a3f97cbb | 13135 | { |
b3694847 | 13136 | dw_separate_line_info_ref line_info; |
5fd9b178 | 13137 | targetm.asm_out.internal_label (asm_out_file, SEPARATE_LINE_CODE_LABEL, |
5c90448c | 13138 | separate_line_info_table_in_use); |
e90b62db | 13139 | |
a1105617 | 13140 | /* Expand the line info table if necessary. */ |
e90b62db JM |
13141 | if (separate_line_info_table_in_use |
13142 | == separate_line_info_table_allocated) | |
13143 | { | |
13144 | separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
13145 | separate_line_info_table | |
703ad42b | 13146 | = ggc_realloc (separate_line_info_table, |
17211ab5 GK |
13147 | separate_line_info_table_allocated |
13148 | * sizeof (dw_separate_line_info_entry)); | |
703ad42b KG |
13149 | memset (separate_line_info_table |
13150 | + separate_line_info_table_in_use, | |
17211ab5 | 13151 | 0, |
7080f735 | 13152 | (LINE_INFO_TABLE_INCREMENT |
17211ab5 | 13153 | * sizeof (dw_separate_line_info_entry))); |
e90b62db | 13154 | } |
71dfc51f RK |
13155 | |
13156 | /* Add the new entry at the end of the line_info_table. */ | |
e90b62db JM |
13157 | line_info |
13158 | = &separate_line_info_table[separate_line_info_table_in_use++]; | |
981975b6 | 13159 | line_info->dw_file_num = lookup_filename (filename); |
e90b62db | 13160 | line_info->dw_line_num = line; |
df696a75 | 13161 | line_info->function = current_function_funcdef_no; |
e90b62db JM |
13162 | } |
13163 | else | |
13164 | { | |
b3694847 | 13165 | dw_line_info_ref line_info; |
71dfc51f | 13166 | |
5fd9b178 | 13167 | targetm.asm_out.internal_label (asm_out_file, LINE_CODE_LABEL, |
5c90448c | 13168 | line_info_table_in_use); |
e90b62db | 13169 | |
71dfc51f | 13170 | /* Expand the line info table if necessary. */ |
e90b62db JM |
13171 | if (line_info_table_in_use == line_info_table_allocated) |
13172 | { | |
13173 | line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
13174 | line_info_table | |
17211ab5 GK |
13175 | = ggc_realloc (line_info_table, |
13176 | (line_info_table_allocated | |
13177 | * sizeof (dw_line_info_entry))); | |
13178 | memset (line_info_table + line_info_table_in_use, 0, | |
13179 | LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry)); | |
e90b62db | 13180 | } |
71dfc51f RK |
13181 | |
13182 | /* Add the new entry at the end of the line_info_table. */ | |
e90b62db | 13183 | line_info = &line_info_table[line_info_table_in_use++]; |
981975b6 | 13184 | line_info->dw_file_num = lookup_filename (filename); |
e90b62db | 13185 | line_info->dw_line_num = line; |
a3f97cbb | 13186 | } |
a3f97cbb JW |
13187 | } |
13188 | } | |
13189 | ||
30f7a378 | 13190 | /* Record the beginning of a new source file. */ |
71dfc51f | 13191 | |
7f905405 | 13192 | static void |
7080f735 | 13193 | dwarf2out_start_source_file (unsigned int lineno, const char *filename) |
a3f97cbb | 13194 | { |
8a7a6f4d | 13195 | if (flag_eliminate_dwarf2_dups) |
881c6935 JM |
13196 | { |
13197 | /* Record the beginning of the file for break_out_includes. */ | |
cc0017a9 ZD |
13198 | dw_die_ref bincl_die; |
13199 | ||
13200 | bincl_die = new_die (DW_TAG_GNU_BINCL, comp_unit_die, NULL); | |
881c6935 JM |
13201 | add_AT_string (bincl_die, DW_AT_name, filename); |
13202 | } | |
2ad9852d | 13203 | |
84a5b4f8 DB |
13204 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
13205 | { | |
715bdd29 | 13206 | named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG); |
84a5b4f8 | 13207 | dw2_asm_output_data (1, DW_MACINFO_start_file, "Start new file"); |
7c262518 RH |
13208 | dw2_asm_output_data_uleb128 (lineno, "Included from line number %d", |
13209 | lineno); | |
73c68f61 | 13210 | maybe_emit_file (lookup_filename (filename)); |
7c262518 RH |
13211 | dw2_asm_output_data_uleb128 (lookup_filename (filename), |
13212 | "Filename we just started"); | |
84a5b4f8 | 13213 | } |
a3f97cbb JW |
13214 | } |
13215 | ||
cc260610 | 13216 | /* Record the end of a source file. */ |
71dfc51f | 13217 | |
7f905405 | 13218 | static void |
7080f735 | 13219 | dwarf2out_end_source_file (unsigned int lineno ATTRIBUTE_UNUSED) |
a3f97cbb | 13220 | { |
881c6935 | 13221 | if (flag_eliminate_dwarf2_dups) |
2ad9852d | 13222 | /* Record the end of the file for break_out_includes. */ |
54ba1f0d | 13223 | new_die (DW_TAG_GNU_EINCL, comp_unit_die, NULL); |
2ad9852d | 13224 | |
84a5b4f8 DB |
13225 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
13226 | { | |
715bdd29 | 13227 | named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG); |
84a5b4f8 DB |
13228 | dw2_asm_output_data (1, DW_MACINFO_end_file, "End file"); |
13229 | } | |
a3f97cbb JW |
13230 | } |
13231 | ||
cc260610 | 13232 | /* Called from debug_define in toplev.c. The `buffer' parameter contains |
a3f97cbb JW |
13233 | the tail part of the directive line, i.e. the part which is past the |
13234 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
71dfc51f | 13235 | |
7f905405 | 13236 | static void |
7080f735 AJ |
13237 | dwarf2out_define (unsigned int lineno ATTRIBUTE_UNUSED, |
13238 | const char *buffer ATTRIBUTE_UNUSED) | |
a3f97cbb | 13239 | { |
84a5b4f8 DB |
13240 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
13241 | { | |
715bdd29 | 13242 | named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG); |
84a5b4f8 DB |
13243 | dw2_asm_output_data (1, DW_MACINFO_define, "Define macro"); |
13244 | dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno); | |
13245 | dw2_asm_output_nstring (buffer, -1, "The macro"); | |
13246 | } | |
a3f97cbb JW |
13247 | } |
13248 | ||
cc260610 | 13249 | /* Called from debug_undef in toplev.c. The `buffer' parameter contains |
a3f97cbb JW |
13250 | the tail part of the directive line, i.e. the part which is past the |
13251 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
71dfc51f | 13252 | |
7f905405 | 13253 | static void |
7080f735 AJ |
13254 | dwarf2out_undef (unsigned int lineno ATTRIBUTE_UNUSED, |
13255 | const char *buffer ATTRIBUTE_UNUSED) | |
a3f97cbb | 13256 | { |
84a5b4f8 DB |
13257 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
13258 | { | |
715bdd29 | 13259 | named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG); |
84a5b4f8 DB |
13260 | dw2_asm_output_data (1, DW_MACINFO_undef, "Undefine macro"); |
13261 | dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno); | |
13262 | dw2_asm_output_nstring (buffer, -1, "The macro"); | |
13263 | } | |
a3f97cbb JW |
13264 | } |
13265 | ||
13266 | /* Set up for Dwarf output at the start of compilation. */ | |
71dfc51f | 13267 | |
a51d908e | 13268 | static void |
7080f735 | 13269 | dwarf2out_init (const char *filename ATTRIBUTE_UNUSED) |
a3f97cbb | 13270 | { |
acc187f5 RH |
13271 | init_file_table (); |
13272 | ||
0a2d3d69 | 13273 | /* Allocate the decl_die_table. */ |
636c7bc4 JZ |
13274 | decl_die_table = htab_create_ggc (10, decl_die_table_hash, |
13275 | decl_die_table_eq, NULL); | |
0a2d3d69 DB |
13276 | |
13277 | /* Allocate the decl_loc_table. */ | |
13278 | decl_loc_table = htab_create_ggc (10, decl_loc_table_hash, | |
13279 | decl_loc_table_eq, NULL); | |
a3f97cbb JW |
13280 | |
13281 | /* Allocate the initial hunk of the decl_scope_table. */ | |
244a4af0 | 13282 | VARRAY_TREE_INIT (decl_scope_table, 256, "decl_scope_table"); |
a3f97cbb JW |
13283 | |
13284 | /* Allocate the initial hunk of the abbrev_die_table. */ | |
17211ab5 GK |
13285 | abbrev_die_table = ggc_alloc_cleared (ABBREV_DIE_TABLE_INCREMENT |
13286 | * sizeof (dw_die_ref)); | |
a3f97cbb | 13287 | abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT; |
71dfc51f | 13288 | /* Zero-th entry is allocated, but unused */ |
a3f97cbb JW |
13289 | abbrev_die_table_in_use = 1; |
13290 | ||
13291 | /* Allocate the initial hunk of the line_info_table. */ | |
17211ab5 GK |
13292 | line_info_table = ggc_alloc_cleared (LINE_INFO_TABLE_INCREMENT |
13293 | * sizeof (dw_line_info_entry)); | |
a3f97cbb | 13294 | line_info_table_allocated = LINE_INFO_TABLE_INCREMENT; |
2ad9852d | 13295 | |
71dfc51f | 13296 | /* Zero-th entry is allocated, but unused */ |
a3f97cbb JW |
13297 | line_info_table_in_use = 1; |
13298 | ||
556273e0 | 13299 | /* Generate the initial DIE for the .debug section. Note that the (string) |
a3f97cbb | 13300 | value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE |
556273e0 | 13301 | will (typically) be a relative pathname and that this pathname should be |
a3f97cbb | 13302 | taken as being relative to the directory from which the compiler was |
c4274b22 RH |
13303 | invoked when the given (base) source file was compiled. We will fill |
13304 | in this value in dwarf2out_finish. */ | |
13305 | comp_unit_die = gen_compile_unit_die (NULL); | |
a3f97cbb | 13306 | |
244a4af0 | 13307 | VARRAY_TREE_INIT (incomplete_types, 64, "incomplete_types"); |
244a4af0 | 13308 | |
1f8f4a0b | 13309 | VARRAY_RTX_INIT (used_rtx_varray, 32, "used_rtx_varray"); |
1865dbb5 | 13310 | |
5c90448c | 13311 | ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0); |
9d2f2c45 RH |
13312 | ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, |
13313 | DEBUG_ABBREV_SECTION_LABEL, 0); | |
b366352b MM |
13314 | if (DWARF2_GENERATE_TEXT_SECTION_LABEL) |
13315 | ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0); | |
13316 | else | |
f99ffb60 | 13317 | strcpy (text_section_label, stripattributes (TEXT_SECTION_NAME)); |
2ad9852d | 13318 | |
556273e0 | 13319 | ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label, |
8b790721 | 13320 | DEBUG_INFO_SECTION_LABEL, 0); |
556273e0 | 13321 | ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label, |
8b790721 | 13322 | DEBUG_LINE_SECTION_LABEL, 0); |
2bee6045 JJ |
13323 | ASM_GENERATE_INTERNAL_LABEL (ranges_section_label, |
13324 | DEBUG_RANGES_SECTION_LABEL, 0); | |
715bdd29 | 13325 | named_section_flags (DEBUG_ABBREV_SECTION, SECTION_DEBUG); |
8b790721 | 13326 | ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label); |
715bdd29 | 13327 | named_section_flags (DEBUG_INFO_SECTION, SECTION_DEBUG); |
8b790721 | 13328 | ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label); |
715bdd29 | 13329 | named_section_flags (DEBUG_LINE_SECTION, SECTION_DEBUG); |
8b790721 | 13330 | ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label); |
2ad9852d | 13331 | |
84a5b4f8 DB |
13332 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
13333 | { | |
715bdd29 | 13334 | named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG); |
84a5b4f8 DB |
13335 | ASM_GENERATE_INTERNAL_LABEL (macinfo_section_label, |
13336 | DEBUG_MACINFO_SECTION_LABEL, 0); | |
13337 | ASM_OUTPUT_LABEL (asm_out_file, macinfo_section_label); | |
13338 | } | |
7c262518 RH |
13339 | |
13340 | if (DWARF2_GENERATE_TEXT_SECTION_LABEL) | |
13341 | { | |
13342 | text_section (); | |
13343 | ASM_OUTPUT_LABEL (asm_out_file, text_section_label); | |
13344 | } | |
a3f97cbb JW |
13345 | } |
13346 | ||
9eb4015a JJ |
13347 | /* A helper function for dwarf2out_finish called through |
13348 | ht_forall. Emit one queued .debug_str string. */ | |
13349 | ||
13350 | static int | |
7080f735 | 13351 | output_indirect_string (void **h, void *v ATTRIBUTE_UNUSED) |
9eb4015a | 13352 | { |
17211ab5 | 13353 | struct indirect_string_node *node = (struct indirect_string_node *) *h; |
9eb4015a | 13354 | |
9eb4015a JJ |
13355 | if (node->form == DW_FORM_strp) |
13356 | { | |
13357 | named_section_flags (DEBUG_STR_SECTION, DEBUG_STR_SECTION_FLAGS); | |
13358 | ASM_OUTPUT_LABEL (asm_out_file, node->label); | |
17211ab5 | 13359 | assemble_string (node->str, strlen (node->str) + 1); |
9eb4015a | 13360 | } |
2ad9852d | 13361 | |
9eb4015a JJ |
13362 | return 1; |
13363 | } | |
13364 | ||
73c68f61 SS |
13365 | |
13366 | ||
13367 | /* Clear the marks for a die and its children. | |
3dc575ff | 13368 | Be cool if the mark isn't set. */ |
73c68f61 SS |
13369 | |
13370 | static void | |
7080f735 | 13371 | prune_unmark_dies (dw_die_ref die) |
73c68f61 SS |
13372 | { |
13373 | dw_die_ref c; | |
13374 | die->die_mark = 0; | |
13375 | for (c = die->die_child; c; c = c->die_sib) | |
13376 | prune_unmark_dies (c); | |
13377 | } | |
13378 | ||
13379 | ||
13380 | /* Given DIE that we're marking as used, find any other dies | |
13381 | it references as attributes and mark them as used. */ | |
13382 | ||
13383 | static void | |
7080f735 | 13384 | prune_unused_types_walk_attribs (dw_die_ref die) |
73c68f61 SS |
13385 | { |
13386 | dw_attr_ref a; | |
13387 | ||
13388 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) | |
13389 | { | |
13390 | if (a->dw_attr_val.val_class == dw_val_class_die_ref) | |
13391 | { | |
13392 | /* A reference to another DIE. | |
13393 | Make sure that it will get emitted. */ | |
13394 | prune_unused_types_mark (a->dw_attr_val.v.val_die_ref.die, 1); | |
13395 | } | |
13396 | else if (a->dw_attr == DW_AT_decl_file) | |
13397 | { | |
13398 | /* A reference to a file. Make sure the file name is emitted. */ | |
13399 | a->dw_attr_val.v.val_unsigned = | |
13400 | maybe_emit_file (a->dw_attr_val.v.val_unsigned); | |
13401 | } | |
13402 | } | |
13403 | } | |
13404 | ||
13405 | ||
13406 | /* Mark DIE as being used. If DOKIDS is true, then walk down | |
13407 | to DIE's children. */ | |
13408 | ||
13409 | static void | |
7080f735 | 13410 | prune_unused_types_mark (dw_die_ref die, int dokids) |
73c68f61 SS |
13411 | { |
13412 | dw_die_ref c; | |
13413 | ||
13414 | if (die->die_mark == 0) | |
13415 | { | |
13416 | /* We haven't done this node yet. Mark it as used. */ | |
13417 | die->die_mark = 1; | |
13418 | ||
13419 | /* We also have to mark its parents as used. | |
13420 | (But we don't want to mark our parents' kids due to this.) */ | |
13421 | if (die->die_parent) | |
13422 | prune_unused_types_mark (die->die_parent, 0); | |
13423 | ||
13424 | /* Mark any referenced nodes. */ | |
13425 | prune_unused_types_walk_attribs (die); | |
47fcfa7b SS |
13426 | |
13427 | /* If this node is a specification, | |
6614fd40 | 13428 | also mark the definition, if it exists. */ |
47fcfa7b SS |
13429 | if (get_AT_flag (die, DW_AT_declaration) && die->die_definition) |
13430 | prune_unused_types_mark (die->die_definition, 1); | |
73c68f61 SS |
13431 | } |
13432 | ||
13433 | if (dokids && die->die_mark != 2) | |
13434 | { | |
13435 | /* We need to walk the children, but haven't done so yet. | |
13436 | Remember that we've walked the kids. */ | |
13437 | die->die_mark = 2; | |
13438 | ||
13439 | /* Walk them. */ | |
13440 | for (c = die->die_child; c; c = c->die_sib) | |
13441 | { | |
13442 | /* If this is an array type, we need to make sure our | |
3dc575ff | 13443 | kids get marked, even if they're types. */ |
73c68f61 SS |
13444 | if (die->die_tag == DW_TAG_array_type) |
13445 | prune_unused_types_mark (c, 1); | |
13446 | else | |
13447 | prune_unused_types_walk (c); | |
13448 | } | |
13449 | } | |
13450 | } | |
13451 | ||
13452 | ||
13453 | /* Walk the tree DIE and mark types that we actually use. */ | |
13454 | ||
13455 | static void | |
7080f735 | 13456 | prune_unused_types_walk (dw_die_ref die) |
73c68f61 SS |
13457 | { |
13458 | dw_die_ref c; | |
13459 | ||
13460 | /* Don't do anything if this node is already marked. */ | |
13461 | if (die->die_mark) | |
13462 | return; | |
13463 | ||
13464 | switch (die->die_tag) { | |
13465 | case DW_TAG_const_type: | |
13466 | case DW_TAG_packed_type: | |
13467 | case DW_TAG_pointer_type: | |
13468 | case DW_TAG_reference_type: | |
13469 | case DW_TAG_volatile_type: | |
13470 | case DW_TAG_typedef: | |
13471 | case DW_TAG_array_type: | |
13472 | case DW_TAG_structure_type: | |
13473 | case DW_TAG_union_type: | |
13474 | case DW_TAG_class_type: | |
13475 | case DW_TAG_friend: | |
13476 | case DW_TAG_variant_part: | |
13477 | case DW_TAG_enumeration_type: | |
13478 | case DW_TAG_subroutine_type: | |
13479 | case DW_TAG_string_type: | |
13480 | case DW_TAG_set_type: | |
13481 | case DW_TAG_subrange_type: | |
13482 | case DW_TAG_ptr_to_member_type: | |
13483 | case DW_TAG_file_type: | |
13484 | /* It's a type node --- don't mark it. */ | |
13485 | return; | |
13486 | ||
13487 | default: | |
13488 | /* Mark everything else. */ | |
13489 | break; | |
13490 | } | |
13491 | ||
13492 | die->die_mark = 1; | |
13493 | ||
13494 | /* Now, mark any dies referenced from here. */ | |
13495 | prune_unused_types_walk_attribs (die); | |
13496 | ||
13497 | /* Mark children. */ | |
13498 | for (c = die->die_child; c; c = c->die_sib) | |
13499 | prune_unused_types_walk (c); | |
13500 | } | |
13501 | ||
13502 | ||
13503 | /* Remove from the tree DIE any dies that aren't marked. */ | |
13504 | ||
13505 | static void | |
7080f735 | 13506 | prune_unused_types_prune (dw_die_ref die) |
73c68f61 SS |
13507 | { |
13508 | dw_die_ref c, p, n; | |
13509 | if (!die->die_mark) | |
13510 | abort(); | |
13511 | ||
13512 | p = NULL; | |
13513 | for (c = die->die_child; c; c = n) | |
13514 | { | |
13515 | n = c->die_sib; | |
13516 | if (c->die_mark) | |
13517 | { | |
13518 | prune_unused_types_prune (c); | |
13519 | p = c; | |
13520 | } | |
13521 | else | |
13522 | { | |
13523 | if (p) | |
13524 | p->die_sib = n; | |
13525 | else | |
13526 | die->die_child = n; | |
13527 | free_die (c); | |
13528 | } | |
13529 | } | |
13530 | } | |
13531 | ||
13532 | ||
13533 | /* Remove dies representing declarations that we never use. */ | |
13534 | ||
13535 | static void | |
7080f735 | 13536 | prune_unused_types (void) |
73c68f61 SS |
13537 | { |
13538 | unsigned int i; | |
13539 | limbo_die_node *node; | |
13540 | ||
13541 | /* Clear all the marks. */ | |
13542 | prune_unmark_dies (comp_unit_die); | |
13543 | for (node = limbo_die_list; node; node = node->next) | |
13544 | prune_unmark_dies (node->die); | |
13545 | ||
13546 | /* Set the mark on nodes that are actually used. */ | |
13547 | prune_unused_types_walk (comp_unit_die); | |
13548 | for (node = limbo_die_list; node; node = node->next) | |
13549 | prune_unused_types_walk (node->die); | |
13550 | ||
13551 | /* Also set the mark on nodes referenced from the | |
13552 | pubname_table or arange_table. */ | |
6a87d634 RS |
13553 | for (i = 0; i < pubname_table_in_use; i++) |
13554 | prune_unused_types_mark (pubname_table[i].die, 1); | |
13555 | for (i = 0; i < arange_table_in_use; i++) | |
13556 | prune_unused_types_mark (arange_table[i], 1); | |
73c68f61 SS |
13557 | |
13558 | /* Get rid of nodes that aren't marked. */ | |
13559 | prune_unused_types_prune (comp_unit_die); | |
13560 | for (node = limbo_die_list; node; node = node->next) | |
13561 | prune_unused_types_prune (node->die); | |
13562 | ||
13563 | /* Leave the marks clear. */ | |
13564 | prune_unmark_dies (comp_unit_die); | |
13565 | for (node = limbo_die_list; node; node = node->next) | |
13566 | prune_unmark_dies (node->die); | |
13567 | } | |
13568 | ||
a3f97cbb JW |
13569 | /* Output stuff that dwarf requires at the end of every file, |
13570 | and generate the DWARF-2 debugging info. */ | |
71dfc51f | 13571 | |
a51d908e | 13572 | static void |
7080f735 | 13573 | dwarf2out_finish (const char *filename) |
a3f97cbb | 13574 | { |
ef76d03b | 13575 | limbo_die_node *node, *next_node; |
ae0ed63a | 13576 | dw_die_ref die = 0; |
ef76d03b | 13577 | |
c4274b22 RH |
13578 | /* Add the name for the main input file now. We delayed this from |
13579 | dwarf2out_init to avoid complications with PCH. */ | |
3b895f8e NS |
13580 | add_name_attribute (comp_unit_die, filename); |
13581 | if (filename[0] != DIR_SEPARATOR) | |
c4274b22 | 13582 | add_comp_dir_attribute (comp_unit_die); |
79c758fb JJ |
13583 | else if (get_AT (comp_unit_die, DW_AT_comp_dir) == NULL) |
13584 | { | |
13585 | size_t i; | |
13586 | for (i = 1; i < VARRAY_ACTIVE_SIZE (file_table); i++) | |
e3091a5f R |
13587 | if (VARRAY_CHAR_PTR (file_table, i)[0] != DIR_SEPARATOR |
13588 | /* Don't add cwd for <built-in>. */ | |
13589 | && VARRAY_CHAR_PTR (file_table, i)[0] != '<') | |
79c758fb JJ |
13590 | { |
13591 | add_comp_dir_attribute (comp_unit_die); | |
13592 | break; | |
13593 | } | |
13594 | } | |
c4274b22 | 13595 | |
ef76d03b JW |
13596 | /* Traverse the limbo die list, and add parent/child links. The only |
13597 | dies without parents that should be here are concrete instances of | |
13598 | inline functions, and the comp_unit_die. We can ignore the comp_unit_die. | |
13599 | For concrete instances, we can get the parent die from the abstract | |
13600 | instance. */ | |
13601 | for (node = limbo_die_list; node; node = next_node) | |
13602 | { | |
13603 | next_node = node->next; | |
13604 | die = node->die; | |
13605 | ||
13606 | if (die->die_parent == NULL) | |
13607 | { | |
a96c67ec | 13608 | dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin); |
54ba1f0d | 13609 | tree context; |
2ad9852d | 13610 | |
a96c67ec JM |
13611 | if (origin) |
13612 | add_child_die (origin->die_parent, die); | |
ef76d03b | 13613 | else if (die == comp_unit_die) |
a96c67ec | 13614 | ; |
aea9695c RK |
13615 | /* If this was an expression for a bound involved in a function |
13616 | return type, it may be a SAVE_EXPR for which we weren't able | |
13617 | to find a DIE previously. So try now. */ | |
13618 | else if (node->created_for | |
13619 | && TREE_CODE (node->created_for) == SAVE_EXPR | |
13620 | && 0 != (origin = (lookup_decl_die | |
13621 | (SAVE_EXPR_CONTEXT | |
13622 | (node->created_for))))) | |
13623 | add_child_die (origin, die); | |
6bb28965 JM |
13624 | else if (errorcount > 0 || sorrycount > 0) |
13625 | /* It's OK to be confused by errors in the input. */ | |
13626 | add_child_die (comp_unit_die, die); | |
54ba1f0d RH |
13627 | else if (node->created_for |
13628 | && ((DECL_P (node->created_for) | |
c26fbbca | 13629 | && (context = DECL_CONTEXT (node->created_for))) |
54ba1f0d RH |
13630 | || (TYPE_P (node->created_for) |
13631 | && (context = TYPE_CONTEXT (node->created_for)))) | |
13632 | && TREE_CODE (context) == FUNCTION_DECL) | |
13633 | { | |
13634 | /* In certain situations, the lexical block containing a | |
13635 | nested function can be optimized away, which results | |
13636 | in the nested function die being orphaned. Likewise | |
13637 | with the return type of that nested function. Force | |
13638 | this to be a child of the containing function. */ | |
13639 | origin = lookup_decl_die (context); | |
13640 | if (! origin) | |
13641 | abort (); | |
13642 | add_child_die (origin, die); | |
13643 | } | |
ef76d03b JW |
13644 | else |
13645 | abort (); | |
13646 | } | |
ef76d03b | 13647 | } |
2ad9852d | 13648 | |
a96c67ec | 13649 | limbo_die_list = NULL; |
ef76d03b | 13650 | |
8a8c3656 JM |
13651 | /* Walk through the list of incomplete types again, trying once more to |
13652 | emit full debugging info for them. */ | |
13653 | retry_incomplete_types (); | |
13654 | ||
881c6935 JM |
13655 | /* We need to reverse all the dies before break_out_includes, or |
13656 | we'll see the end of an include file before the beginning. */ | |
13657 | reverse_all_dies (comp_unit_die); | |
13658 | ||
03275f81 ZD |
13659 | if (flag_eliminate_unused_debug_types) |
13660 | prune_unused_types (); | |
13661 | ||
881c6935 JM |
13662 | /* Generate separate CUs for each of the include files we've seen. |
13663 | They will go into limbo_die_list. */ | |
5f632b5e JM |
13664 | if (flag_eliminate_dwarf2_dups) |
13665 | break_out_includes (comp_unit_die); | |
881c6935 JM |
13666 | |
13667 | /* Traverse the DIE's and add add sibling attributes to those DIE's | |
13668 | that have children. */ | |
a3f97cbb | 13669 | add_sibling_attributes (comp_unit_die); |
881c6935 JM |
13670 | for (node = limbo_die_list; node; node = node->next) |
13671 | add_sibling_attributes (node->die); | |
a3f97cbb JW |
13672 | |
13673 | /* Output a terminator label for the .text section. */ | |
7c262518 | 13674 | text_section (); |
5fd9b178 | 13675 | targetm.asm_out.internal_label (asm_out_file, TEXT_END_LABEL, 0); |
a3f97cbb | 13676 | |
db3c0315 MM |
13677 | /* Output the source line correspondence table. We must do this |
13678 | even if there is no line information. Otherwise, on an empty | |
13679 | translation unit, we will generate a present, but empty, | |
13680 | .debug_info section. IRIX 6.5 `nm' will then complain when | |
13681 | examining the file. */ | |
13682 | if (! DWARF2_ASM_LINE_DEBUG_INFO) | |
e90b62db | 13683 | { |
715bdd29 | 13684 | named_section_flags (DEBUG_LINE_SECTION, SECTION_DEBUG); |
db3c0315 MM |
13685 | output_line_info (); |
13686 | } | |
71dfc51f | 13687 | |
b38a75e5 RH |
13688 | /* Output location list section if necessary. */ |
13689 | if (have_location_lists) | |
13690 | { | |
13691 | /* Output the location lists info. */ | |
13692 | named_section_flags (DEBUG_LOC_SECTION, SECTION_DEBUG); | |
13693 | ASM_GENERATE_INTERNAL_LABEL (loc_section_label, | |
13694 | DEBUG_LOC_SECTION_LABEL, 0); | |
13695 | ASM_OUTPUT_LABEL (asm_out_file, loc_section_label); | |
13696 | output_location_lists (die); | |
13697 | have_location_lists = 0; | |
13698 | } | |
13699 | ||
db3c0315 MM |
13700 | /* We can only use the low/high_pc attributes if all of the code was |
13701 | in .text. */ | |
13702 | if (separate_line_info_table_in_use == 0) | |
13703 | { | |
13704 | add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label); | |
13705 | add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label); | |
e90b62db | 13706 | } |
2ad9852d RK |
13707 | |
13708 | /* If it wasn't, we need to give .debug_loc and .debug_ranges an appropriate | |
13709 | "base address". Use zero so that these addresses become absolute. */ | |
a20612aa RH |
13710 | else if (have_location_lists || ranges_table_in_use) |
13711 | add_AT_addr (comp_unit_die, DW_AT_entry_pc, const0_rtx); | |
e90b62db | 13712 | |
fe7cd37f RH |
13713 | if (debug_info_level >= DINFO_LEVEL_NORMAL) |
13714 | add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list, | |
13715 | debug_line_section_label); | |
db3c0315 | 13716 | |
84a5b4f8 DB |
13717 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
13718 | add_AT_lbl_offset (comp_unit_die, DW_AT_macro_info, macinfo_section_label); | |
a96c67ec | 13719 | |
881c6935 JM |
13720 | /* Output all of the compilation units. We put the main one last so that |
13721 | the offsets are available to output_pubnames. */ | |
13722 | for (node = limbo_die_list; node; node = node->next) | |
cc0017a9 | 13723 | output_comp_unit (node->die, 0); |
2ad9852d | 13724 | |
cc0017a9 | 13725 | output_comp_unit (comp_unit_die, 0); |
881c6935 | 13726 | |
a3f97cbb | 13727 | /* Output the abbreviation table. */ |
715bdd29 | 13728 | named_section_flags (DEBUG_ABBREV_SECTION, SECTION_DEBUG); |
a3f97cbb JW |
13729 | output_abbrev_section (); |
13730 | ||
2ad9852d | 13731 | /* Output public names table if necessary. */ |
d291dd49 JM |
13732 | if (pubname_table_in_use) |
13733 | { | |
715bdd29 | 13734 | named_section_flags (DEBUG_PUBNAMES_SECTION, SECTION_DEBUG); |
d291dd49 JM |
13735 | output_pubnames (); |
13736 | } | |
13737 | ||
2ad9852d RK |
13738 | /* Output the address range information. We only put functions in the arange |
13739 | table, so don't write it out if we don't have any. */ | |
a3f97cbb JW |
13740 | if (fde_table_in_use) |
13741 | { | |
715bdd29 | 13742 | named_section_flags (DEBUG_ARANGES_SECTION, SECTION_DEBUG); |
a3f97cbb JW |
13743 | output_aranges (); |
13744 | } | |
a20612aa | 13745 | |
a20612aa RH |
13746 | /* Output ranges section if necessary. */ |
13747 | if (ranges_table_in_use) | |
13748 | { | |
715bdd29 | 13749 | named_section_flags (DEBUG_RANGES_SECTION, SECTION_DEBUG); |
2bee6045 | 13750 | ASM_OUTPUT_LABEL (asm_out_file, ranges_section_label); |
a20612aa RH |
13751 | output_ranges (); |
13752 | } | |
13753 | ||
30f7a378 | 13754 | /* Have to end the primary source file. */ |
cc260610 | 13755 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
c26fbbca | 13756 | { |
715bdd29 | 13757 | named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG); |
cc260610 | 13758 | dw2_asm_output_data (1, DW_MACINFO_end_file, "End file"); |
2f8d482e | 13759 | dw2_asm_output_data (1, 0, "End compilation unit"); |
cc260610 | 13760 | } |
9eb4015a | 13761 | |
2ad9852d | 13762 | /* If we emitted any DW_FORM_strp form attribute, output the string |
9eb4015a JJ |
13763 | table too. */ |
13764 | if (debug_str_hash) | |
17211ab5 | 13765 | htab_traverse (debug_str_hash, output_indirect_string, NULL); |
a3f97cbb | 13766 | } |
e2500fed GK |
13767 | #else |
13768 | ||
13769 | /* This should never be used, but its address is needed for comparisons. */ | |
13770 | const struct gcc_debug_hooks dwarf2_debug_hooks; | |
13771 | ||
13772 | #endif /* DWARF2_DEBUGGING_INFO */ | |
13773 | ||
13774 | #include "gt-dwarf2out.h" |